Mental Math test

3/4 of a number is 15. What is the number?

• 20

• 25

• 30

• 35

2/3 of a number is 10. What is the number?

• 12

• 15

• 18

• 17

What is the area of a square with sides of 6 cm?

• 20 cm²

• 24 cm²

• 36 cm²

• 10 cm²

When a certain number is multiplied by 5 the answer is 375. What is the number?

• 71

• 75

• 78

• 73

Which number is three thousand and nine?

• 3900

• 3090

• 3009

• 9003

What is the area of a rectangle 9 cm long by 5 cm wide?

• 36 cm²

• 45 cm²

• 54cm²

• 63 cm²

Which is the longest amount of time?

• 50 days

• 6 weeks

• 2 months

Take 100 from the smallest number: 2314, 2143, 2413.

• 2214

• 2043

• 2313

5 Bananas cost ₦1.50. What would 15 bananas cost?

• ₦4.50

• ₦5.50

• ₦6.00

• ₦6.50

Take half of ₦8.50 from ₦5.00.

• ₦0.55

• ₦0.65

• ₦0.75

• ₦0.85