Daily Brain Teasers for Monday, 06 October 2025
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Calculate the number 9167
NUMBERMANIA: Calculate the number 9167 using numbers [3, 7, 9, 6, 41, 893] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Find number abc
If 9ab5c + 1018b = 10a5b7 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.
Bottle Of Wine
Sally was driving home from one of her business trips in Northern Arizona when she saw an elderly Navajo woman walking on the side of the road. As the trip was a long and quiet one, she stopped the car and asked the Navajo woman if she would like a ride. With a silent nod of thanks, the woman got into the car.
Resuming the journey, Sally tried in vain to make a bit of small talk with the Navajo woman. The old woman just sat silently, looking intently at everything she saw, studying every little detail, until she noticed a brown bag on the seat next to Sally.
'What in bag?' asked the old woman. Sally looked down at the brown bag and said, 'It's a bottle of wine. I got it for my husband.'
The Navajo woman was silent for another moment or two. Then speaking with the quiet wisdom of an elder, she said, 'Good trade.'
Calculate the number 6370
NUMBERMANIA: Calculate the number 6370 using numbers [2, 8, 2, 6, 15, 812] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
George WestinghouseBorn 6 Oct 1846; died 12 Mar 1914 at age 67. American engineer, inventor and industrialist who founded his own company to manufacturer his invention, the air brake. The son of a New York agricultural machinery maker, he began at age 21 to work on a new tool he invented to guide derailed train cars back onto the track. Before he died 46 years later, he produced safer rail transportation, steam turbines, gas lighting and heating, and electricity. He founded not only namesakes Westinghouse Air Brake and Westinghouse Electric, but also Union Switch & Signal and the forerunners to Duquesne Light, Equitable Gas and Rockwell International. He was also chiefly responsible for the adoption of alternating current for electric power transmission in the United States, and held 400 patents. |
MAGIC SQUARE: Calculate A-B-C
The aim is to place the some numbers from the list (10, 11, 12, 20, 21, 22, 27, 32, 55, 56, 57, 72) 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 5b95a - c005c = ab89b 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 334
NUMBERMANIA: Calculate the number 334 using numbers [6, 4, 2, 4, 52, 926] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Find number abc
If 81ac8 + 86a21 = 16ba59 find number abc. Multiple solutions may exist.
Find the right 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.
