65% of a number is 21 less than 80%. Number is: MCQ with Answer and Explanation

65% of a number is 21 less than 80%. Number is:

A. 140

B. 120

C. 150

D. 130

Answer: Option A

0.8x - 0.65x = 21 → 0.15x = 21 → x = 140.

This question belongs to: Maths Percentage

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Question #1 Report Error

A man spends 60% of his salary and saves Rs. 8000. His salary is:

A. 20000

B. 22000

C. 15000

D. 18000

Correct Answer: Option A

Explanation:
Savings = 40% = 8000 → salary = 8000/0.4 = 20000.

This question belongs to: Maths Percentage

Question #2 Report Error

Cost article Rs. 500, marked up 60%, then 25% discount. Selling price:

A. 575

B. 625

C. 550

D. 600

Correct Answer: Option D

Explanation:
Marked = 500×1.6 = 800, SP = 800×0.75 = 600.

This question belongs to: Maths Percentage

Question #3 Report Error

Rice price reduced by 10%, a man buys 4 kg more for Rs. 144. Reduced price per kg is:

A. Rs. 3.8

B. Rs. 3.6

C. Rs. 3.4

D. Rs. 3.2

Correct Answer: Option B

Explanation:
Original x, xy=144. 0.9x(y+4)=144 → 129.6+3.6x=144 → x=4, reduced = 3.6.

This question belongs to: Maths Percentage