BRAIN TEASERS
Daily Brain Teasers

Daily Brain Teasers

puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ...
Daily Brain Teasers for Friday, 29 May 2020
● Stereogram - 3D Image ● Find the title of movie, using the move of a chess knight. First letter is C. Length of words in solution: 4,6. ● NUMBERMANIA: Calculate the number 927 using numbers [3, 4, 7, 7, 73, 145] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● Remove 4 letters from this sequence (EVPIASODELI) to reveal a familiar English word. ● The aim is to place the some numbers from the list (7, 8, 9, 11, 12, 13, 25, 36, 69, 70, 71, 82, 83) 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. ● MATH PUZZLE: Can you replace the question mark with a number? ● Find the first and the last name of a famous person. Text may go in all 8 directions. Length of words in solution: 4,7. ● If 4c09c + 114a8 = b8bab find number abc. Multiple solutions may exist. ● Stereogram - 3D Image ● Find the title of movie, using the move of a chess knight. First letter is O. Length of words in solution: 4,4,1,4,2,9.
Daily Brain Teasers for Thursday, 28 May 2020
● Remove 4 letters from this sequence (EVPIASODELI) to reveal a familiar English word. ● The aim is to place the some numbers from the list (7, 8, 9, 11, 12, 13, 25, 36, 69, 70, 71, 82, 83) 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. ● MATH PUZZLE: Can you replace the question mark with a number? ● Find the first and the last name of a famous person. Text may go in all 8 directions. Length of words in solution: 4,7. ● If 4c09c + 114a8 = b8bab find number abc. Multiple solutions may exist. ● Stereogram - 3D Image ● Find the title of movie, using the move of a chess knight. First letter is O. Length of words in solution: 4,4,1,4,2,9. ● 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. ● Remove 3 letters from this sequence (TLAITOEST) to reveal a familiar English word. ● NUMBERMANIA: Calculate the number 2230 using numbers [8, 2, 9, 5, 62, 673] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Daily Brain Teasers for Wednesday, 27 May 2020
● MATH PUZZLE: Can you replace the question mark with a number? ● Find the first and the last name of a famous person. Text may go in all 8 directions. Length of words in solution: 4,7. ● If 4c09c + 114a8 = b8bab find number abc. Multiple solutions may exist. ● Stereogram - 3D Image ● Find the title of movie, using the move of a chess knight. First letter is O. Length of words in solution: 4,4,1,4,2,9. ● 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. ● Remove 3 letters from this sequence (TLAITOEST) to reveal a familiar English word. ● NUMBERMANIA: Calculate the number 2230 using numbers [8, 2, 9, 5, 62, 673] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● MATH PUZZLE: Can you replace the question mark with a number? ● Remove 2 letters from this sequence (ZPAPERM) to reveal a familiar English word.

A 6th Grade Teacher Asks a Question

A 6th-grade teacher posed the following problem to one of her arithmetic classes:
“A wealthy man dies and leaves ten million dollars.
One-fifth is to go to his wife, one-fifth is to go to his son, one-sixth to his butler, and the rest to charity.
Now, what does each get?”
After a very long silence in the classroom, one little boy raised his hand.
With complete sincerity in his voice, answered, “A lawyer!”

Jokes of the day - Daily updated jokes. New jokes every day.
Daily Brain Teasers for Tuesday, 26 May 2020
● Stereogram - 3D Image ● Find the title of movie, using the move of a chess knight. First letter is O. Length of words in solution: 4,4,1,4,2,9. ● 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. ● Remove 3 letters from this sequence (TLAITOEST) to reveal a familiar English word. ● NUMBERMANIA: Calculate the number 2230 using numbers [8, 2, 9, 5, 62, 673] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● MATH PUZZLE: Can you replace the question mark with a number? ● Remove 2 letters from this sequence (ZPAPERM) to reveal a familiar English word. ● If cbca5 - ab1a4 = b0801 find number abc. Multiple solutions may exist. ● Can you name the athletes by the picture? ● Mathematical Puzzle: IF 1111=5, 2222=24 and 3333=93 THEN 77777=?
Daily Brain Teasers for Monday, 25 May 2020
● Remove 3 letters from this sequence (TLAITOEST) to reveal a familiar English word. ● NUMBERMANIA: Calculate the number 2230 using numbers [8, 2, 9, 5, 62, 673] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● MATH PUZZLE: Can you replace the question mark with a number? ● Remove 2 letters from this sequence (ZPAPERM) to reveal a familiar English word. ● If cbca5 - ab1a4 = b0801 find number abc. Multiple solutions may exist. ● Can you name the athletes by the picture? ● Mathematical Puzzle: IF 1111=5, 2222=24 and 3333=93 THEN 77777=? ● Find the 7 letters word. Word may go in all 8 directions. ● 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. ● Look at the series (10, 34, A, 214, B, 760, 1264, D, 2974, 4294, 6010, C, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B*C*D!
Daily Brain Teasers for Sunday, 24 May 2020
● MATH PUZZLE: Can you replace the question mark with a number? ● Remove 2 letters from this sequence (ZPAPERM) to reveal a familiar English word. ● If cbca5 - ab1a4 = b0801 find number abc. Multiple solutions may exist. ● Can you name the athletes by the picture? ● Mathematical Puzzle: IF 1111=5, 2222=24 and 3333=93 THEN 77777=? ● Find the 7 letters word. Word may go in all 8 directions. ● 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. ● Look at the series (10, 34, A, 214, B, 760, 1264, D, 2974, 4294, 6010, C, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B*C*D! ● Find the title of movie, using the move of a chess knight. First letter is P. Length of words in solution: 4,7. ● NUMBERMANIA: Calculate the number 518 using numbers [7, 3, 2, 9, 43, 658] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Daily Brain Teasers for Saturday, 23 May 2020
● Can you name the athletes by the picture? ● Mathematical Puzzle: IF 1111=5, 2222=24 and 3333=93 THEN 77777=? ● Find the 7 letters word. Word may go in all 8 directions. ● 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. ● Look at the series (10, 34, A, 214, B, 760, 1264, D, 2974, 4294, 6010, C, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B*C*D! ● Find the title of movie, using the move of a chess knight. First letter is P. Length of words in solution: 4,7. ● NUMBERMANIA: Calculate the number 518 using numbers [7, 3, 2, 9, 43, 658] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (5, 14, 17, 20, 22, 23, 28, 42, 45, 50, 71) 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. ● MATH PUZZLE: Can you replace the question mark with a number? ● Find the 7 letters word. Word may go in all 8 directions.
Daily Brain Teasers for Friday, 22 May 2020
● Look at the series (10, 34, A, 214, B, 760, 1264, D, 2974, 4294, 6010, C, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B*C*D! ● Find the title of movie, using the move of a chess knight. First letter is P. Length of words in solution: 4,7. ● NUMBERMANIA: Calculate the number 518 using numbers [7, 3, 2, 9, 43, 658] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● The aim is to place the some numbers from the list (5, 14, 17, 20, 22, 23, 28, 42, 45, 50, 71) 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. ● MATH PUZZLE: Can you replace the question mark with a number? ● Find the 7 letters word. Word may go in all 8 directions. ● If aaacb - b7711 = 31114 find number abc. Multiple solutions may exist. ● Find the title of movie, using the move of a chess knight. First letter is A. Length of words in solution: 5,4. ● 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. ● MATH PUZZLE: Can you replace the question mark with a number?
Daily Brain Teasers for Thursday, 21 May 2020
● The aim is to place the some numbers from the list (5, 14, 17, 20, 22, 23, 28, 42, 45, 50, 71) 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. ● MATH PUZZLE: Can you replace the question mark with a number? ● Find the 7 letters word. Word may go in all 8 directions. ● If aaacb - b7711 = 31114 find number abc. Multiple solutions may exist. ● Find the title of movie, using the move of a chess knight. First letter is A. Length of words in solution: 5,4. ● 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. ● MATH PUZZLE: Can you replace the question mark with a number? ● NUMBERMANIA: Calculate the number 621 using numbers [7, 5, 2, 5, 31, 138] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 8651a + 8422c = 1babcc find number abc. Multiple solutions may exist. ● Find the first and the last name of a famous person. Text may go in all 8 directions. Length of words in solution: 5,6.
Daily Brain Teasers for Wednesday, 20 May 2020
● MATH PUZZLE: Can you replace the question mark with a number? ● Find the 7 letters word. Word may go in all 8 directions. ● If aaacb - b7711 = 31114 find number abc. Multiple solutions may exist. ● Find the title of movie, using the move of a chess knight. First letter is A. Length of words in solution: 5,4. ● 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. ● MATH PUZZLE: Can you replace the question mark with a number? ● NUMBERMANIA: Calculate the number 621 using numbers [7, 5, 2, 5, 31, 138] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. ● If 8651a + 8422c = 1babcc find number abc. Multiple solutions may exist. ● Find the first and the last name of a famous person. Text may go in all 8 directions. Length of words in solution: 5,6. ● 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.
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Edison patents

In 1883, Thomas A. Edison received a series of patent for some of his electrical inventions. One patent was for a "Dynamo-Electric Machine" (U.S. No. 278,419), and two for a "Regulator for Dynamo-Electric Machines" (No. 278,413 and -4). Three of the patents covered the "Manufacture of Incandescing Electric Lamps" (No. 278,415; -6 and -7), and one for an "Apparatus for Translating Electric Currents From High to Low Tension," (No. 278418). In addition a Design Patent No. 13940 was issued for a "Design for Incandescing Electric Lamp."
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