Daily Brain Teasers for Thursday, 31 July 2025
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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 (3, 4, 6, 26, 27, 29, 40, 63, 64, 66, 73) 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.
#brainteasers #math #magicsquare
Find number abc
If b8c55 + 8c32c = c7b47a find number abc. Multiple solutions may exist.
#brainteasers #math
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.
#brainteasers #mastermind
The Typewriter
They had been up in the attic together doing some cleaning. The kids uncovered an old manual typewriter and asked, 'Hey Mom, what's this?'
'Oh, that's an old typewriter,' she answered, thinking that would satisfy their curiosity.
'Well what does it do?' they asked.
'I'll show you,' she said and returned with a blank piece of paper. She rolled the paper into the typewriter and began striking the keys, leaving black letters of print on the page.
'WOW!' they exclaimed, 'That's really cool.! But how does it work like that? Where do you plug it in?'
'There is no plug,' she answered. 'It doesn't need a plug.'
'Then where do you put the batteries?' they persisted.
'It doesn't need batteries either.' she continued.
'Wow! This is so cool!' they exclaimed. 'Someone should have invented this a long time ago!'
Calculate the number 1132
NUMBERMANIA: Calculate the number 1132 using numbers [5, 3, 2, 2, 93, 977] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
John EricssonBorn 31 Jul 1803; died 8 Mar 1889 at age 85.Swedish-American inventor and naval engineer, who became an American citizen in 1847. He was the inventor of the screw propeller, built the first armoured turret warship, the USS Monitor. At the age of 14, he participated in the building of the Göta Canal (1817). A locomotive of his design, The Novelty, participated in a competition with Stephenson's Rocket in 1829. Ericsson invented and patented (No.588, on 1 Feb 1836) a double rotation propeller. In Aug 1861, the American Congress authorized ironclad warships and one ship of the Monitor type designed by Ericsson was ordered. By Mar 1862 the Monitor was ready for sea. He also developed a torpedo boat, The Destroyer, and worked to design his sun-motor engine. |
Find number abc
If c7caa - b8c3a = ac030 find number abc. Multiple solutions may exist.
#brainteasers #math
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.
#brainteasers #mastermind
Calculate the number 4237
NUMBERMANIA: Calculate the number 4237 using numbers [5, 6, 2, 8, 46, 778] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania
MAGIC SQUARE: Calculate A-B*C
The aim is to place the some numbers from the list (1, 3, 4, 14, 16, 17, 27, 42, 44, 45, 47) 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.
#brainteasers #math #magicsquare
Find number abc
If 69c00 - 1b92a = aac7a find number abc. Multiple solutions may exist.
#brainteasers #math
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.
#brainteasers #mastermind
