Daily Brain Teasers for Sunday, 06 July 2025
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Find number abc
If 9b0a5 - 1bc0a = 79259 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 4136
NUMBERMANIA: Calculate the number 4136 using numbers [3, 6, 3, 4, 73, 763] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Empire State Building Fall
Two men are sitting drinking at a bar at the top of the Empire State Building when the first man turns to the other and says, "You know, last week I discovered that if you jump from the top of this building, by the time you fall to the 10th floor, the winds around the building are so intense that they carry you around the building and back into the window."
The bartender just shakes his head in disapproval while wiping the bar.
The second guy says, "What are you a nut? There is no way that could happen."
"No, it's true," said the first man, let me prove it to you." He gets up from the bar, jumps over the balcony, and plummets to the street below. When he passes the 10th floor, the high wind whips him around the building and back into the 10th floor window and he takes the elevator back up to the bar.
He met the second man, who looked quite astonished. "You know, I saw that with my own eyes, but that must have been a one time fluke."
"No, I'll prove it again," says the first man as he jumps. Again just as he is hurling toward the street, the 10th floor wind gently carries him around the building and into the window.
Once upstairs he urges his fellow drinker to try it. "Well, what the hey," the second guy says, "it works, I'll try it!" He jumps over the balcony plunges downward, passes the 11th, 10th, 9th, 8th floors ...and hits the sidewalk with a 'splat.'
Back upstairs the Bartender turns to the other drinker, saying "You know, Superman, sometimes you can be a real jerk."
MAGIC SQUARE: Calculate A-B-C
The aim is to place the some numbers from the list (3, 4, 6, 7, 8, 9, 10, 11, 14, 23, 27) 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.
Edward Goodrich AchesonDied 6 Jul 1931 at age 75 (born 9 Mar 1856).American inventor who discovered the abrasive carborundum, the second hardest substance (next to diamonds) and later perfected a method for making graphite. In his early career, he had worked at Thomas Edison's Menlo Park (1880-84), but left to become an independent inventor. In 1891, he was experimenting with an electric furnace, trying to make diamonds from a molten mixture of powdered coke and clay. Instead of diamonds, he found he had made small, gritty, hard crystals almost as hard as diamonds. He determined that this crystalline substance was silicon carbide. It was very effective as an abrasive, which Acheson patented(28 Feb 1892) and called “carborundum.” Heestablished the Carborundum Company (1894), to make grinding wheels, whet stones, and powdered abrasives.« |
Find number abc
If 6ba99 + b0bab = 94cac 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.
Calculate the number 4740
NUMBERMANIA: Calculate the number 4740 using numbers [5, 5, 2, 5, 70, 944] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Find number abc
If 6c4a6 + 9cb53 = b546c9 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.
Calculate the number 7043
NUMBERMANIA: Calculate the number 7043 using numbers [8, 5, 6, 8, 55, 472] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
