A number increased by 60% then decreased by 60% gives 256. The number is: MCQ with Answer and Explanation

A number increased by 60% then decreased by 60% gives 256. The number is:

A. 420

B. 400

C. 360

D. 380

Answer: Option B

1.6 × 0.4 = 0.64, 0.64x=256 → x=400.

This question belongs to: Maths Percentage

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Question #1 Report Error

A number is increased by 15% and then decreased by 20%. The result is 276. Find the original number.

A. 250

B. 300

C. 320

D. 280

Correct Answer: Option B

Explanation:
1.15 × 0.8 = 0.92, 0.92x = 276 → x = 300.

This question belongs to: Maths Percentage

Question #2 Report Error

In an election, 80% cast votes. Winner got 55% of cast votes, won by 800. Total voters:

A. 10000

B. 8000

C. 12000

D. 15000

Correct Answer: Option A

Explanation:
Cast votes C, winner 0.55C, loser 0.45C, margin 0.1C=800 → C=8000. Total T, 0.8T=8000 → T=10000.

This question belongs to: Maths Percentage

Question #3 Report Error

A's income is 25% more than B's, B's is 20% more than C's. A's income is what percent more than C's?

A. 45%

B. 50%

C. 40%

D. 55%

Correct Answer: Option B

Explanation:
C=100, B=120, A=150, so A is 50% more than C.

This question belongs to: Maths Percentage