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BRAIN TEASERS Flashcards | StudBud
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BRAIN TEASERS
BRAIN TEASERS
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Answers
1
The difference between a three-digit and a two-digit number is 1. What are the numbers?
9 and 10
999 and 1000
99 and 100
199 and 200
2
Marko wrote all the numbers from 1 to 100 on a piece of paper. How many times did he write digit 3 while doing that?
He wrote it 19 times.
He wrote it 21 times.
He wrote it 20 times.
He wrote it 18 times.
3
The sum of four numbers is 8 and the multiplication of those four numbers is 8. What are the numbers?
The numbers are 2,2,1 i 1.
The numbers are 1,4,2 i 4.
The numbers are 2,1,2 i 4.
The numbers are 1,1,2 i 4.
4
How much older is a turtle than a frog if their combined age is 66 and the turtle was 62 when the frog was hatched.
The turtle is 64 now and the frog is 2
The turtle is 65 now and the frog is 3
The turtle is 66 now and the frog is 3
The turtle is 70 now and the frog is 2
5
How many two-digit numbers can be written with digits 1,2,3?
8
9
4
6
6
6 friends met at a park. If each one of them shakes hands with everybody else, how many handshakes will be exchanged?
36
12
6
15
7
How can we increase number 66 by its half without performing any arithmetic operation?
We can't.
Swap the numbers.
Turn around the first number.
Turn it up side down.
8
What's the sum of individual digits of the number we get by adding 99 and 9 together.
The sum of the digit is 108
The sum of the digit is 90
The sum of the digit is 9
The sum of the digit is 199
9
In how many different ways can you dress if you have three pairs of pants and 5 shirts?
In 15 ways.
In 19 ways.
In 12 ways.
In 8 ways.
10
Ana and John have the same number of apples. John gives Ana 4 apples. How many more apples has the sister got now?
Sister has 4 apples more.
Sister has 8 apples more.
Sister has 12 apples more.
Sister has 6 apples more.
