Brain Bugs (Maths)

The price of an item increases by 20% and then decreases by 20%. So the price has:

• Increased by 4%

• Decreased by 4%

• Increased by 0%

• Increased by 40%

The ratio of girls: boys in a school is 5:7. If there are 525 girls, how many boys are there?

• 375

• 625

• 735

• 375

Change 3/20 into a decimal:

• 0.3

• 0.5

• 0.15

• 1.5

4*4-2*(-3)+6= ?

• 17

• 28

• -36

• None

What is three fifth of 100?

• 60

• 20

• 50

• 5

If David’s age is 27 years old in 2011. What was his age in 2003?

• 17

• 18

• 21

• 19

What is the remainder of 21 divided by 7?

• 3

• 7

• 1

• 0

What is 7% equal to?

• 0.007

• 0.07

• 0.7

• 7

I am a number. I have 7 in the ones place. I am less than 80 but greater than 70. What is my number?

• 71

• 73

• 77

• 79

How many years are there in a decade?

• 10

• 5

• 100

• 50