Selected MCQ

Current Question
The temperature at noon was 6°C on Monday and 4°C on Tuesday. Find the average temperature change.
  • A. 14°C
  • B. −2°C
  • C. 2°C
  • D. 7°C
Correct Answer: C
Explanation:
Change = 6 − 4 = 2°C.
Related Question 1
Three years ago, the average age of 6 members was 19. Find the present age of a boy.
  • A. 1 year
  • B. 1.5 years
  • C. 2 years
  • D. 2.5 years
Correct Answer: A
Explanation:
Total age difference method.
Related Question 2
A student scores 60 in Maths and Physics. Chemistry is 20 marks more than Maths. Find the average marks.
  • A. 40
  • B. 30
  • C. 25
  • D. Data inadequate
Correct Answer: A
Explanation:
Total = 60 + 60 + 80 = 200 → avg = 40.
Related Question 3
The sum of five numbers is 655. The average of the first two is 85. Find the sum of the last three.
  • A. 180
  • B. 170
  • C. 190
  • D. 175
Correct Answer: A
Explanation:
Subtract known sum.
Related Question 4
The present average age of a family of five is 26 years. If conditions change, what is the new average?
  • A. 18 years
  • B. 14 years
  • C. 20 years
  • D. 16 years
Correct Answer: C
Explanation:
Based on the given adjustments, the new average becomes 20 years.
Related Question 5
The population of a town increased from 175000 to 262500 in 10 years. Find the average annual percentage increase.
  • A. 4.37%
  • B. 5%
  • C. 6%
  • D. 8.75%
Correct Answer: B
Explanation:
Using the compound growth formula gives ≈ 5% annually.