A sum of money at simple interest amounts to Rs. 850 in 3 years and to Rs. 925 in 4 years. Find the principal. MCQ with Answer and Explanation

A sum of money at simple interest amounts to Rs. 850 in 3 years and to Rs. 925 in 4 years. Find the principal.

A. Rs. 600

B. Rs. 650

C. Rs. 675

D. Rs. 625

Answer: Option D

SI for 1 year = 925-850 = 75. For 3 years SI = 225, principal = 850-225=625.

This question belongs to: Maths Percentage

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Question #1 Report Error

A can do a work in 15 days and B in 20 days. They work together for 6 days, then A leaves. In how many more days will B finish the remaining work?

A. 8 days

B. 5 days

C. 6 days

D. 4 days

Correct Answer: Option C

Explanation:
Work done in 6 days = 6×(1/15+1/20)=6×(7/60)=7/10. Remaining=3/10. B's rate=1/20, time = (3/10)×20=6 days.

This question belongs to: Maths Percentage

Question #2 Report Error

In a mixture of 120 litres, the ratio of milk and water is 2:1. How much water is added to change the ratio to 1:2?

A. 110 L

B. 100 L

C. 130 L

D. 120 L

Correct Answer: Option D

Explanation:
Milk=80, water=40. For 1:2, water=160, add 120 L.

This question belongs to: Maths Percentage

Question #3 Report Error

Price of TV increased 25% then decreased 25%. Net change:

A. 5% decrease

B. 6.25% decrease

C. 6.25% increase

D. No change

Correct Answer: Option B

Explanation:
1.25 × 0.75 = 0.9375, 6.25% decrease.

This question belongs to: Maths Percentage