Selected MCQ

Current Question
If the population increases by 10% and then decreases by 10%, what is the net change?
  • A. 8500
  • B. 8000
  • C. 8100
  • D. 8400
Correct Answer: B
Explanation:
Net decrease = 1%.
Related Question 1
The price of an article increases by 30% in the first year and decreases by 20% in the next year. What is the net change?
  • A. Rs. 1500
  • B. Rs. 1800
  • C. Rs. 2000
  • D. Rs. 2400
Correct Answer: C
Explanation:
Net factor = 1.3 × 0.8 = 1.04 → 4% increase.
Related Question 2
If a number increases by 100% and then decreases by 50%, net change is ____.
  • A. No change
  • B. 50% increase
  • C. 50% decrease
  • D. 25% increase
Correct Answer: A
Explanation:
2 × 0.5 = 1 → no change.
Related Question 3
If price increases by 50% and consumption decreases by 20%, what is the change in expenditure?
  • A. 20% increase
  • B. 25% increase
  • C. No change
  • D. 10% decrease
Correct Answer: A
Explanation:
1.5 × 0.8 = 1.2 → 20% increase.
Related Question 4
A population decreases by 10% and then increases by 10%. Net effect is ____.
  • A. No change
  • B. 1% increase
  • C. 1% decrease
  • D. 2% decrease
Correct Answer: C
Explanation:
Net effect = −1%.
Related Question 5
If a number increases by 50% and then decreases by 50%, net change is ____.
  • A. 25% decrease
  • B. 25% increase
  • C. No change
  • D. 50% decrease
Correct Answer: A
Explanation:
1.5 × 0.5 = 0.75 → 25% decrease.