Daily Brain Teasers for Thursday, 14 October 2021
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
MAGIC SQUARE: Calculate A*B-C
The aim is to place the some numbers from the list (6, 7, 8, 24, 25, 26, 64, 65, 66) 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 2ac88 + aa728 = 8b4bc 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. 
You’re in Charge of...
An Italian, an Irishman and a Chinese fellow are hired at a construction site. The manager points out a huge pile of sand and says to the Italian, "You're in charge of sweeping". To the Irishman, "You're in charge of shoveling" To the Chinese guy, "And you're in charge of supplies". "Now, I have to leave for a little while. I expect you guys to make a dent in that pile."
So the manager goes away for a couple of hours. And when he returns, the pile of sand is untouched. He says to the Italian, "Why didn't you sweep any of it?
The Italian guy replies, "I didn't have a broom. You said the Chinese guy was in charge of the supplies, but he disappeared and I couldn't find him" So then the manager turns to the Irishman and asks why he didn't shovel.
The Irishman replies, "I couldn't get myself a shovel. You left the Chinese guy in charge of supplies and I couldn't find him." The manager is really pissed now, and storms off toward the pile of Sand looking for the Chinese guy.
Just then, the Chinese guy springs out from behind the pile of sand and yells, "SUPPLIES!"
Calculate the number 483
NUMBERMANIA: Calculate the number 483 using numbers [6, 8, 9, 6, 45, 212] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Black-American patentIn 1834, Henry Blair of Glenross, Maryland, received a U.S. patent on a corn planter (No. X8447). Two years later, on 31 Aug 1836, he was also issued a patent on a cotton seed planter (No. 15). Blair was born in Maryland about 1807 and lived until 1860. He was a successful farmer whose inventions met a need to increase efficiency in farming. His patents were signed with a simple "X" because he had not learned to read or write. Henry Blair was the second African-American to hold a patent. For some time he had been regarded as the first, until it became better known that the first African-American on record to be granted a patent was Thomas Jennings for a "dry-scouring" cleaning process (3 Mar 1821, No. X3306).«[Image top: side view of machine; bottom: detail of section of seed hopper showing cylinder with holes in the periphery that turns with the wheels to drop grains of corn.] |
Find number abc
If 90a99 + accb9 = cbc6b8 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 856
NUMBERMANIA: Calculate the number 856 using numbers [4, 9, 4, 4, 30, 764] 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 (7, 11, 13, 18, 21, 22, 24, 25, 27, 43) 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 ac0aa - ab414 = 2ccb 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. 
