OC Mathematical Reasoning 1 — Questions and Answers
Question 1: A rectangle has a length of 12 cm and a width of 7 cm. What is its perimeter?
- 38 cm (Correct answer)
- 42 cm
- 84 cm
- 19 cm
Correct answer: 38 cm
Perimeter = 2(l + w) = 2(12 + 7) = 38 cm.
Question 2: What is 35% of 80?
- 24
- 28 (Correct answer)
- 32
- 35
Correct answer: 28
35% of 80 = 0.35 × 80 = 28.
Question 3: A train travels 240 miles in 4 hours. What is its average speed?
- 50 mph
- 55 mph
- 60 mph (Correct answer)
- 65 mph
Correct answer: 60 mph
Speed = Distance ÷ Time = 240 ÷ 4 = 60 mph.
Question 4: What is the next number in the sequence: 3, 6, 12, 24, ___?
- 36
- 42
- 48 (Correct answer)
- 60
Correct answer: 48
Each term is doubled to get the next term, so 24 × 2 = 48.
Question 5: If 4x + 5 = 25, what is the value of x?
- 4
- 5 (Correct answer)
- 6
- 7
Correct answer: 5
4x = 20, so x = 5.
Question 6: A bag contains 5 red, 3 blue, and 2 green marbles. What is the probability of picking a blue marble?
- 1/5
- 3/10 (Correct answer)
- 2/5
- 1/2
Correct answer: 3/10
Probability = 3/10 since there are 3 blue out of 10 total marbles.
OC Mathematical Reasoning 1
A rectangle has a length of 12 cm and a width of 7 cm.
What is its perimeter?