Civil Service Exam Reviewer · Basic Operations · hard

Evaluate: (−4)³ − (−2)² + 8

1. 68
2. -52
3. -60
4. -76

Answer

C. -60

Solution

(−4)³ = −64 (odd power keeps the sign); (−2)² = 4. −64 − 4 + 8 = -60.

More Basic Operations questions

1. Multiply: (7 × 102) × (3 × 104). Express in scientific notation.
2. Evaluate: 2.5 × 1/2 + 0.5 ÷ 7/8
3. Evaluate: 24 × 22 ÷ 25
4. Which of the following fractions is the SMALLEST: 1/4, 5/11, 3/4, 5/6?
5. Which of the following fractions is the LARGEST: 8/9, 8/11, 2/3, 3/8?
6. Express the repeating decimal 0.202020… as a fraction in lowest terms.
7. Express 1.6 as a fraction in lowest terms.
8. Evaluate: 2 1/2 × 3 1/3 ÷ 2/3
9. Evaluate: 39 − [77 − (8 × 9 − 40)] ÷ 5
10. Two school bells ring every 20 and 28 minutes, respectively. If they ring together at 6:00 AM, when will they next ring together?

All Basic Operations questions