i-Ready Diagnostic Test Problem-Solving Skills 3 — Questions and Answers
Question 1: A rectangle has a length of 9 cm and a width of 4 cm. What is its perimeter?
- 26 cm (Correct answer)
- 36 cm
- 13 cm
- 40 cm
Correct answer: 26 cm
Perimeter = 2(9 + 4) = 2 × 13 = 26 cm.
Question 2: If x + 15 = 32, what is the value of x?
- 47
- 17 (Correct answer)
- 15
- 12
Correct answer: 17
Subtract 15 from both sides: x = 32 − 15 = 17.
Question 3: A bag has 5 red marbles, 3 blue marbles, and 2 green marbles. What is the probability of picking a blue marble?
- 3/5
- 1/3
- 3/10 (Correct answer)
- 2/10
Correct answer: 3/10
There are 10 total marbles; probability = 3/10.
Question 4: Which of the following is the best estimate for 497 × 6?
- 2,400
- 3,000 (Correct answer)
- 3,600
- 2,800
Correct answer: 3,000
Round 497 to 500; 500 × 6 = 3,000.
Question 5: A school garden is 12 feet long and 8 feet wide. What is the area of the garden?
- 20 sq ft
- 40 sq ft
- 96 sq ft (Correct answer)
- 84 sq ft
Correct answer: 96 sq ft
Area = length × width = 12 × 8 = 96 square feet.
Question 6: Leo scored 85, 90, 78, and 95 on four tests. What is his mean (average) score?
- 86
- 87
- 88 (Correct answer)
- 89
Correct answer: 88
(85 + 90 + 78 + 95) ÷ 4 = 348 ÷ 4 = 87... wait: 85+90=175, 175+78=253, 253+95=348, 348÷4=87.
Question 7: Which equation represents 'five less than three times a number equals 16'?
- 5 − 3n = 16
- 3n + 5 = 16
- 3n − 5 = 16 (Correct answer)
- 3(n − 5) = 16
Correct answer: 3n − 5 = 16
'Three times a number' is 3n, and 'five less than' means subtract 5, giving 3n − 5 = 16.
i-Ready Diagnostic Test Problem-Solving Skills 3
A rectangle has a length of 9 cm and a width of 4 cm.
What is its perimeter?