Daily Brain Teasers for Friday, 31 January 2025
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Calculate the number 345
NUMBERMANIA: Calculate the number 345 using numbers [9, 4, 3, 4, 18, 406] 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 (1, 3, 6, 8, 10, 15, 19, 21, 25, 28, 54) 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 b5075 + 224ca = a0753c find number abc. Multiple solutions may exist.
10 yo-yo jokes to celebrate National yo-yo day
1. Why don't yo-yos make good friends?
- Because they always let you down!
2. What did the yo-yo say to the tightrope?
- "Now, that's what I call a string walk!"
3. How do yo-yos cheer each other up?
- They say, "Hang in there, it'll be an up and down ride!"
4. Why was the yo-yo so good at making decisions?
- It always knew how to go back and forth!
5. Why don't yo-yos work in zero gravity?
- They can't deal with the ups and downs!
6. What did the yo-yo say to the super glue?
- "I need someone who won't let go!"
7. Why was the yo-yo the life of the party?
- Because it always knew how to unwind!
8. How did the yo-yo become a successful motivational speaker?
- It always knew how to bounce back!
9. What do yo-yos say when they introduce themselves?
- "I’m not as up-tight as I appear!"
10. Why was the yo-yo accused of being a spy?
- Because it always goes undercover!
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.
End of OSCAR 1In 1962, OSCAR 1, the first Orbiting Satellite Carrying Amateur Radio burnt up in the Earth's atmosphere. Its orbit had decayed since its last transmission on 1 Jan 1962, having spent 312 orbits in 22 days signalling HI in Morse code for radio amateurs around the world to receive from space until its non-rechargeable battery failed. It was achieved by San Francisco Bay radio hams, most having experience working at electronics companies, who arranged for their 10-lb hand-built transmitter to be placed in orbit just above the Earth's atmosphere, carried piggyback on a rocket launched to deploy a military satellite on 12 Dec 1961. That day marked the 60th anniversary of Marconi's first transatlantic radio transmission. It was also little more than four years since Russia launched the Sputnik satellite on 31 Jan 1957.«[Image: OSCAR 1 satellite held by Frank Ginner, one of its builders.] |
Calculate the number 5278
NUMBERMANIA: Calculate the number 5278 using numbers [5, 8, 8, 6, 84, 675] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Find number abc
If ba1b0 + 27b4c = 866ac 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 5447
NUMBERMANIA: Calculate the number 5447 using numbers [1, 3, 7, 9, 40, 496] 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 (19, 20, 21, 22, 26, 27, 30, 32, 37, 41, 54) 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 9029a - bb88a = 23ca0 find number abc. Multiple solutions may exist.
