Quantitative Aptitude Basics Flashcards

What is the median of the data set: 7, 15, 3, 22, 9, 11, 5?

Answer: 9

Sorted: 3,5,7,9,11,15,22 — the middle (4th) value is 9.

Two angles of a triangle are 45° and 75°. What is the third angle?

Answer: 60°

Angles in a triangle sum to 180°; third angle = 180 − 45 − 75 = 60°.

If a number is increased by 40% and then decreased by 40%, what is the net change?

Answer: −16%

1.4 × 0.6 = 0.84, meaning the number is 84% of the original — a 16% decrease.

What is the HCF (GCD) of 72 and 96?

Answer: 24

72 = 2³×3², 96 = 2⁵×3; HCF = 2³×3 = 24.

A circle has a radius of 7 cm. What is its circumference? (Use π ≈ 22/7)

Answer: 44 cm

Circumference = 2πr = 2 × (22/7) × 7 = 44 cm.

If the simple interest on $2,000 at 5% per year for 3 years is calculated, what is the total amount owed?

Answer: $2,300

Simple interest = P×R×T = 2000×0.05×3 = $300; total = $2,000 + $300 = $2,300.

What is the next number in the sequence: 2, 6, 18, 54, ___?

Answer: 162

Each term is multiplied by 3; 54 × 3 = 162.