Stanford Achievement Test Stanford Achievement (Math) 4

Question 1

A car depreciates in value by 20% each year. If it is worth $15,000 today, what will it be worth after one year?

Accepted Answer

$12,000

Answer

$15,000 × (1 − 0.20) = $15,000 × 0.80 = $12,000.

Question 2

What is the area of a triangle with a base of 10 cm and a height of 6 cm?

Accepted Answer

30 cm²

Answer

Area = (1/2) × base × height = (1/2) × 10 × 6 = 30 cm².

Question 3

Which of the following is the correct order from least to greatest: 0.45, 1/3, 2/5?

Accepted Answer

1/3, 2/5, 0.45

Answer

1/3 ≈ 0.333, 2/5 = 0.40, and 0.45, so the order is 1/3, 2/5, 0.45.

Question 4

A baker uses 2¼ cups of flour per batch of cookies. How many cups are needed for 4 batches?

Accepted Answer

9 cups

Answer

2¼ × 4 = 9/4 × 4 = 9 cups.

Question 5

On a coordinate plane, what are the coordinates of a point 3 units to the right and 5 units up from the origin?

Accepted Answer

(3, 5)

Answer

Right means positive x and up means positive y, giving the point (3, 5).

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