Selected MCQ

Current Question
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 1
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.
Related Question 2
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 3
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 4
If a number increases by 30% and then decreases by 20%, net effect is ____.
  • A. 4% increase
  • B. 4% decrease
  • C. No change
  • D. 6% increase
Correct Answer: A
Explanation:
1.3 × 0.8 = 1.04 → 4% increase.
Related Question 5
If a number decreases by 50% and then increases by 100%, net effect is ____.
  • A. No change
  • B. 50% increase
  • C. 50% decrease
  • D. 100% increase
Correct Answer: A
Explanation:
0.5 × 2 = 1.