OC Numerical Problem Solving 3

Question 1

A book has 320 pages. Maya reads 1/4 on Monday and 2/5 on Tuesday. How many pages remain?

Accepted Answer

112

Answer

Maya reads 80 + 128 = 208 pages, leaving 320 − 208 = 112 pages.

Question 2

A plumber charges $50 for the first hour and $35 for each additional hour. What is the cost for 4 hours?

Accepted Answer

$155

Answer

$50 + (3 × $35) = $50 + $105 = $155.

Question 3

If 6 pens cost $4.50, what is the cost of 10 pens?

Accepted Answer

$7.50

Answer

Each pen costs $4.50 ÷ 6 = $0.75, so 10 pens cost $7.50.

Question 4

A container has 3.6 liters of juice poured equally into 8 cups. How much juice is in each cup?

Accepted Answer

0.45 L

Answer

3.6 ÷ 8 = 0.45 liters per cup.

Question 5

What is the smallest prime number greater than 20?

Accepted Answer

23

Answer

23 is prime; 21 = 3 × 7 and 22 = 2 × 11 are not prime.

OC - Opportunity Class Test Practice Test