BRAIN TEASERS
Daily Brain Teasers

Daily Brain Teasers

puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ...
Daily Brain Teasers for Sunday, 19 May 2019
● If 47aba - a90cb = 2c04c find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 2432 using numbers [5, 6, 7, 7, 30, 158] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (3, 4, 10, 14, 15, 21, 33, 42, 70, 71, 77, 88) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A*B-C. ● If cac69 + 89cc6 = 1a1b05 find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 1157 using numbers [8, 5, 8, 3, 77, 801] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 7bb49 - 2249a = 5c85b find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 539 using numbers [2, 4, 5, 5, 90, 357] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Daily Brain Teasers for Saturday, 18 May 2019
● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 2432 using numbers [5, 6, 7, 7, 30, 158] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (3, 4, 10, 14, 15, 21, 33, 42, 70, 71, 77, 88) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A*B-C. ● If cac69 + 89cc6 = 1a1b05 find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 1157 using numbers [8, 5, 8, 3, 77, 801] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 7bb49 - 2249a = 5c85b find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 539 using numbers [2, 4, 5, 5, 90, 357] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (13, 14, 16, 17, 21, 22, 23, 24, 30, 66, 80) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C.
Daily Brain Teasers for Friday, 17 May 2019
● NUMBERMANIA: Calculate the number 2432 using numbers [5, 6, 7, 7, 30, 158] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (3, 4, 10, 14, 15, 21, 33, 42, 70, 71, 77, 88) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A*B-C. ● If cac69 + 89cc6 = 1a1b05 find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 1157 using numbers [8, 5, 8, 3, 77, 801] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 7bb49 - 2249a = 5c85b find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 539 using numbers [2, 4, 5, 5, 90, 357] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (13, 14, 16, 17, 21, 22, 23, 24, 30, 66, 80) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C. ● If 6bca8 - 3695a = 2ac9a find number abc. Multiple solutions may exist.

Three women: one engaged, one...

Three women: one engaged, one married and one a mistress, are chatting about their relationships and decided they needed to spice up their love lives. All three agreed to wear black leather bras, stiletto heels and a mask over their eyes that evening with their respective lovers.
After a few days they meet up for lunch and compared notes.
The engaged woman: "The other night when my boyfriend came over he found me with a black leather bodice, tall stilettos and a mask. He saw me and said, 'You are the woman of my life. I love you.' Then we made love all night long."
The mistress: "Me too! The other night I met my lover at his office and I was wearing the leather bodice, heels, mask over my eyes and a raincoat. When I opened the raincoat he didn't say a word, but we had wild sex all night."
The married woman: "I sent the kids to stay at my mother's house for the night when my husband came home I was wearing the leather bodice, black stockings, stilettos and a mask over my eyes. As soon as he came in the door and saw me he said, 'What's for dinner, Batman?'"
Jokes of the day - Daily updated jokes. New jokes every day.
Daily Brain Teasers for Thursday, 16 May 2019
● The aim is to place the some numbers from the list (3, 4, 10, 14, 15, 21, 33, 42, 70, 71, 77, 88) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A*B-C. ● If cac69 + 89cc6 = 1a1b05 find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 1157 using numbers [8, 5, 8, 3, 77, 801] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 7bb49 - 2249a = 5c85b find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 539 using numbers [2, 4, 5, 5, 90, 357] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (13, 14, 16, 17, 21, 22, 23, 24, 30, 66, 80) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C. ● If 6bca8 - 3695a = 2ac9a find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Daily Brain Teasers for Wednesday, 15 May 2019
● If cac69 + 89cc6 = 1a1b05 find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 1157 using numbers [8, 5, 8, 3, 77, 801] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 7bb49 - 2249a = 5c85b find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 539 using numbers [2, 4, 5, 5, 90, 357] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (13, 14, 16, 17, 21, 22, 23, 24, 30, 66, 80) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C. ● If 6bca8 - 3695a = 2ac9a find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 1416 using numbers [9, 4, 5, 4, 54, 693] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Daily Brain Teasers for Tuesday, 14 May 2019
● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 1157 using numbers [8, 5, 8, 3, 77, 801] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 7bb49 - 2249a = 5c85b find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 539 using numbers [2, 4, 5, 5, 90, 357] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (13, 14, 16, 17, 21, 22, 23, 24, 30, 66, 80) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C. ● If 6bca8 - 3695a = 2ac9a find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 1416 using numbers [9, 4, 5, 4, 54, 693] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 431ac - 1ba58 = ab8ba find number abc. Multiple solutions may exist.
Daily Brain Teasers for Monday, 13 May 2019
● NUMBERMANIA: Calculate the number 1157 using numbers [8, 5, 8, 3, 77, 801] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 7bb49 - 2249a = 5c85b find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 539 using numbers [2, 4, 5, 5, 90, 357] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (13, 14, 16, 17, 21, 22, 23, 24, 30, 66, 80) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C. ● If 6bca8 - 3695a = 2ac9a find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 1416 using numbers [9, 4, 5, 4, 54, 693] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 431ac - 1ba58 = ab8ba find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Daily Brain Teasers for Sunday, 12 May 2019
● If 7bb49 - 2249a = 5c85b find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 539 using numbers [2, 4, 5, 5, 90, 357] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (13, 14, 16, 17, 21, 22, 23, 24, 30, 66, 80) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C. ● If 6bca8 - 3695a = 2ac9a find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 1416 using numbers [9, 4, 5, 4, 54, 693] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 431ac - 1ba58 = ab8ba find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 310 using numbers [4, 4, 1, 1, 28, 278] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Daily Brain Teasers for Saturday, 11 May 2019
● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 539 using numbers [2, 4, 5, 5, 90, 357] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (13, 14, 16, 17, 21, 22, 23, 24, 30, 66, 80) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C. ● If 6bca8 - 3695a = 2ac9a find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 1416 using numbers [9, 4, 5, 4, 54, 693] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 431ac - 1ba58 = ab8ba find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 310 using numbers [4, 4, 1, 1, 28, 278] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (14, 16, 21, 23, 24, 26, 31, 47, 71, 73, 81) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A-B-C.
Daily Brain Teasers for Friday, 10 May 2019
● NUMBERMANIA: Calculate the number 539 using numbers [2, 4, 5, 5, 90, 357] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (13, 14, 16, 17, 21, 22, 23, 24, 30, 66, 80) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C. ● If 6bca8 - 3695a = 2ac9a find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 1416 using numbers [9, 4, 5, 4, 54, 693] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 431ac - 1ba58 = ab8ba find number abc. Multiple solutions may exist. ● The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. ● NUMBERMANIA: Calculate the number 310 using numbers [4, 4, 1, 1, 28, 278] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (14, 16, 21, 23, 24, 26, 31, 47, 71, 73, 81) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A-B-C. ● If a9aac + 8cc86 = 1b98b6 find number abc. Multiple solutions may exist.
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Aircraft Anti Hijacking System Patent

In 1974, a U.S. patent was issued to Gustano A. Pizzo (1926-2006) of Jackson Heights, N.Y., for his “Anti Hijacking System for Aircraft” (No. 3,811,643). It described an electro-mechanical system immediately aft of the pilots cabin to trap airplane hijackers. When activated a hijacker is dropped by trap doors through the floor into a net bag in the belly area. The hijacker's weight causes a draw cord to close the bag and also automatically open the airplane's specially-installed bomb bay doors. The encapsulated hijacker is dropped and parachuted to earth, where police, having been alerted by radio, await his arrival. On 21 Sep 2013, Pizzo was posthumously awarded the Ig Nobel Prize for Safety Engineering.«
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