Mathematics Challenge for Grade 7

What is the ratio of 20 to 50 in simplest form?

• 4 to 10

• 2 to 5

• 3 to 5

• 1 to 2

If 5 apples cost $2, how much do 12 apples cost using the unitary method?

• $6.00

• $3.00

• $4.80

• $5.20

Convert 0.75 to a fraction.

• 1/2

• 2/3

• 4/5

• 3/4

What is 25% of 200?

• 100

• 75

• 50

• 25

If a shirt is sold for $30 and the cost price is $20, what is the profit?

• $15

• $20

• $5

• $10

Calculate the simple interest on $500 at a rate of 5% per annum for 3 years.

• $150

• $100

• $75

• $50

If the ratio of boys to girls in a class is 3:2, how many girls are there if there are 15 boys?

• 12

• 10

• 5

• 20

A car is bought for $15,000 and sold for $18,000. What is the percentage profit?

• 15%

• 30%

• 25%

• 20%

Convert 3/4 to a decimal.

• 0.8

• 0.75

• 0.6

• 0.7

If a product is marked at $80 and is sold at a 20% discount, what is the selling price?

• $60

• $72

• $64

• $50