West B Test Mathematics 3

Question 1

A store marks up a $40 item by 25%. What is the new selling price?

Accepted Answer

$50

Answer

25% of $40 = $10, so the selling price = $40 + $10 = $50.

Question 2

What is the least common multiple (LCM) of 4 and 6?

Accepted Answer

12

Answer

Multiples of 4: 4, 8, 12… and multiples of 6: 6, 12… so LCM = 12.

Question 3

A bag contains 3 red, 5 blue, and 2 green marbles. What is the probability of randomly selecting a blue marble?

Accepted Answer

5/10

Answer

5 blue out of 10 total marbles gives a probability of 5/10 = 1/2.

Question 4

Which expression represents the distributive property applied to 3(x + 4)?

Accepted Answer

3x + 12

Answer

Distributing 3 gives 3·x + 3·4 = 3x + 12.

Question 5

What is the area of a circle with radius 5 cm? (Use π ≈ 3.14)

Accepted Answer

78.5 cm²

Answer

Area = πr² = 3.14 × 5² = 3.14 × 25 = 78.5 cm².

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