TEAS Math: Numbers and Operations 2 — Questions and Answers
Question 1: Which of the following numbers is prime?
- 37 (Correct answer)
- 51
- 49
- 91
Correct answer: 37
37 has no divisors other than 1 and itself; 51 = 3×17, 49 = 7×7, 91 = 7×13.
Question 2: What is the least common multiple (LCM) of 6 and 8?
- 24 (Correct answer)
- 12
- 48
- 16
Correct answer: 24
Multiples of 6: 6, 12, 18, 24; multiples of 8: 8, 16, 24 — the smallest shared value is 24.
Question 3: Convert 7/8 to a decimal.
- 0.875 (Correct answer)
- 0.78
- 0.7
- 0.87
Correct answer: 0.875
7 ÷ 8 = 0.875.
Question 4: A store marks up a $40 item by 25%. What is the new price?
- $50 (Correct answer)
- $45
- $48
- $65
Correct answer: $50
25% of $40 is $10; $40 + $10 = $50.
Question 5: Round 4.7852 to the nearest hundredth.
- 4.79 (Correct answer)
- 4.78
- 4.8
- 4.785
Correct answer: 4.79
The digit in the thousandths place is 5, so round the hundredths digit up: 4.79.
Question 6: What is the greatest common factor (GCF) of 36 and 48?
- 12 (Correct answer)
- 6
- 18
- 24
Correct answer: 12
Factors of 36: 1,2,3,4,6,9,12,18,36; factors of 48 include 12; the greatest shared factor is 12.
Question 7: Express 0.00045 in scientific notation.
- 4.5 × 10⁻⁴ (Correct answer)
- 4.5 × 10⁴
- 45 × 10⁻⁵
- 0.45 × 10⁻³
Correct answer: 4.5 × 10⁻⁴
Move the decimal 4 places right to get 4.5, so the exponent is −4: 4.5 × 10⁻⁴.
TEAS Math: Numbers and Operations 2
Which of the following numbers is prime?