Daily Brain Teasers for Friday, 11 August 2023
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Calculate the number 6416
NUMBERMANIA: Calculate the number 6416 using numbers [7, 3, 8, 3, 58, 625] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
MAGIC SQUARE: Calculate A*B-C
The aim is to place the some numbers from the list (16, 19, 23, 31, 34, 38, 48, 69, 72, 76) 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 98160 + a721b = 1aca7b find number abc. Multiple solutions may exist.

Disappearing diner
A man and a beautiful woman were having dinner in a fine restaurant. Their waitress, taking another order at a table a few paces away suddenly noticed that the man was slowing sliding down his chair and under the table, but the woman acted unconcerned. The waitress watched as the man slid all the way down his chair and out of sight under the table. Still, the woman dining across from him appeared calm and unruffled, apparently unaware that her dining companion had disappeared.
After the waitress finished taking the order, she came over to the table and said to the woman, "Pardon me, ma'am, but I think your husband just slid under the table." The woman calmly looked up at her and replied firmly, "No he didn't. My husband just walked in the door."
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.
Total eclipseIn 1999, the last total eclipse of the millenium occurred. Because it travelled across many populated areas, it was perhaps the most-watched eclipse of all time, seen by possibly 350 million people. Totality occurred first over the mid-Atlantic Ocean. The first land crossed by the moon's shadow was the Isles of Scilly, then the far south-west of England, in Cornwall. Although the sun was obscured by clouds there, a dramatic darkness fell, and the temperature dropped, during the totality lasting 1-min 30-sec. From there the path of totality tracked across Europe, India and Iran. In Egypt, Muslims were ordered by clerics to shut themselves away, but Jordan and Syria declared a national holiday.«[Image: total eclipse viewed from an airplane above the clouds in Cornwall.] |
Calculate the number 2810
NUMBERMANIA: Calculate the number 2810 using numbers [4, 6, 2, 4, 33, 971] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Find number abc
If bcb8a - 8bbb3 = cbb4 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 890
NUMBERMANIA: Calculate the number 890 using numbers [8, 2, 4, 7, 28, 839] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
MAGIC SQUARE: Calculate A-B*C
The aim is to place the some numbers from the list (11, 13, 17, 18, 19, 20, 22, 24, 27, 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 8bbba - c0333 = 2b442 find number abc. Multiple solutions may exist.