Maths Brain Teasers

Question 1

A boy is two years old, his brother is half as old as him. When the first boy is 100, how old will his brother be?

Accepted Answer

99

Question 2

What is the next number in this sequence: 2, 5, 9, 14, ...

Accepted Answer

20

Question 3

What is the place value of the 5 in the number 254, 879

Accepted Answer

50, 000

Question 4

Where do parallel lines meet?

Accepted Answer

They don't

Question 5

If 7 is transformed into 13 and 11 is changed to 21, then what will 16 become?

Accepted Answer

31

Question 6

Which is correct: seven and five is thirteen or seven and five are thirteen?

Accepted Answer

Neither

Question 7

If a child is 9 and their dad is 47, how old will dad be when the child is 21?

Accepted Answer

59

Question 8

What year is shown by the roman numerals?

Accepted Answer

2021

Question 9

A farmer has seventeen sheep. All but nine of them die. How many sheep does he have left?

Accepted Answer

9

Question 10

10 candles are burning in a room. 3 are blown out. Assuming the other 7 keep burning, how many will you have left?

Accepted Answer

3

Questions 10