Daily Brain Teasers for Monday, 20 July 2026
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Calculate the number 6585
NUMBERMANIA: Calculate the number 6585 using numbers [9, 7, 7, 9, 62, 790] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Find number abc
If a896c + 4b7a5 = 7a685 find number abc. Multiple solutions may exist.
Which is a winning combination of digits?
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.
Bar girls and hockey players
A man walked into the produce section of his local supermarket and asked to buy half a head of lettuce. The boy working in that department told him that they only sold whole heads of lettuce.
The man was insistent that the boy ask his manager about the matter. Walking into the back room, the boy said to his manager, "Some asshole wants to buy a half a head of lettuce."
As he finished his sentence, he turned to find the man standing right behind him, so he added, "and this gentleman kindly offered to buy the other half."
The manager approved the deal and the man went on his way. Later the manager found the boy and said,
"I was impressed with the way you got yourself out of that situation earlier. We like people who think on their feet here. Where are you from, son?"
"Canada, sir," the boy replied.
"Well, why did you leave Canada?" the manager asked.
The boy said, "Sir, there's nothing but bar girls and hockey players up there."
"Really!" said the manager. "My wife is from Canada!
The boy replied, "No kidding???? Who did she play for?"
Joke found on forums.anandtech.com, posted on Sep 5, 2001 by forum user Wingznut
Calculate the number 3160
NUMBERMANIA: Calculate the number 3160 using numbers [1, 8, 1, 2, 73, 335] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
John PlayfairDied 20 Jul 1819 at age 71 (born 10 Mar 1748). Scottish mathematician, physicist, and geologist who is remembered for his axiom that two intersecting straight lines cannot both be parallel to a third straight line. His Illustrations of the Huttonian Theory of the Earth (1802) gave strong support to James Hutton's principle of uniformitarianism, essential to a proper understanding of geology. Playfair was the first scientist to recognise that a river cuts its own valley, and he cited British examples of the gradual, fluvial origins of valleys, to challenge the catastrophic theory (based on the Biblical Flood in Genesis) that was still widely accepted. He was also the first to link the relocation of loose rocks to the movement of glaciers. Playfair published texts on geometry, physics, and astronomy.« |
MAGIC SQUARE: Calculate A*B+C
The aim is to place the some numbers from the list (6, 17, 18, 20, 21, 28, 29, 31, 53, 56, 64) 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.
Find number abc
If ab12c + ba6b3 = 1b3cc0 find number abc. Multiple solutions may exist.
What a winning combination?
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.
Calculate the number 2473
NUMBERMANIA: Calculate the number 2473 using numbers [7, 6, 5, 4, 29, 960] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Find number abc
If 8cb7b - b1cac = a1a4a find number abc. Multiple solutions may exist.
Which is a winning combination of digits?
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.
