Fun Math Brain Teasers

Front

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

Back

9

Front

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

Back

31

Front

A boy is 2 years old, his brother is half as old as him. When the first boy is 100, how old will his brother be?

Back

99

Front

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

Back

9

Front

Give the place value of 5 in the number 254,879.

Back

50,000

Front

How many centimeters are in a meter?

Back

100

Front

Which of these numbers are prime numbers: 7, 8, 9, 10, 11, 12, 13, 14?

Back

7, 11, 13

Front

You are 9 years old and your dad is 47. How old will your dad be when you are 21?

Back

59

Front

What are the next three numbers in this series: 14, 21, 28, 35,...

Back

42, 49, 56

Front

What is a greater distance: 10 inches or 10 centimeters?

Back

10 inches