PAPA PAPA Number Sense & Operations 2 — Questions and Answers
Question 1: If a car travels 240 miles on 8 gallons of gas, what is its fuel efficiency in miles per gallon?
- 20 mpg
- 28 mpg
- 30 mpg (Correct answer)
- 32 mpg
Correct answer: 30 mpg
240 miles ÷ 8 gallons = 30 miles per gallon.
Question 2: Which of the following represents the number 4.07 × 10³ in standard form?
- 0.00407
- 40.7
- 407
- 4,070 (Correct answer)
Correct answer: 4,070
Moving the decimal point 3 places to the right gives 4,070.
Question 3: A store sells 3 notebooks for $4.50. At this rate, what is the cost of 7 notebooks?
- $9.00
- $10.50 (Correct answer)
- $12.00
- $13.50
Correct answer: $10.50
The unit price is $4.50 ÷ 3 = $1.50; 7 × $1.50 = $10.50.
Question 4: What is 15% of 240?
- 30
- 36 (Correct answer)
- 40
- 45
Correct answer: 36
15% × 240 = 0.15 × 240 = 36.
Question 5: Which set of numbers is ordered from least to greatest?
- 0.45, 2/5, 1/2, 0.6
- 2/5, 0.45, 1/2, 0.6 (Correct answer)
- 1/2, 2/5, 0.45, 0.6
- 0.6, 1/2, 0.45, 2/5
Correct answer: 2/5, 0.45, 1/2, 0.6
2/5 = 0.40, 0.45, 1/2 = 0.50, 0.6 — these are in ascending order.
Question 6: A pizza is divided into 8 equal slices. If 5 slices have been eaten, what percentage of the pizza remains?
- 37.5% (Correct answer)
- 40%
- 62.5%
- 75%
Correct answer: 37.5%
3 slices remain out of 8 total; 3/8 = 0.375 = 37.5%.
Question 7: Which of the following is a prime number?
- 21
- 27
- 37 (Correct answer)
- 51
Correct answer: 37
37 has no factors other than 1 and itself, making it a prime number.
PAPA PAPA Number Sense & Operations 2
If a car travels 240 miles on 8 gallons of gas, what is its fuel efficiency in miles per gallon?