1) Mr. X spends 20%of his monthly income on household expenditure. Out of the remaining 25%he spends on children's education,15%on transport, 15%onmedicine and 10%on entertainment. He is left with Rs. 9,800after incurring all these expenditures. What is his monthly income?

[A] Rs 35000
[B] Rs 28000
[C] Rs 65333
[D] Rs 48400

2) Rubina decided to donate 16%ofher monthly salary to an NGO. On the day of donation she changed her mind and donated Rs. 6,567 which was 75% of what she had decided earlier. How much is Rubina's monthly salary ?

(A) Rs. 8.756
(B) Rs. 54.725
(C) Rs. 6.56.700
(D) Rs. 45.696

3) Sanjay borrowed a certain sum from Anil at a certain rate of simple interest for 2 yr. He lent this sum to Ram at the same rate of interest compounded annually for the same period. At the end of two years, he received Rs. 4200 as compound interest but paid Rs. 4000 only as simple interest, find the rate of interest.

[A] 15%
[B] 20%
[C] 35%
[D] 10%

4) Two equal sums of money were invested, one at 4% and the other at 41/2. At the end of 7 yr, the simple interest received from the latter exceeded that received from the former by Rs. 31.50. Each sum was?

[A] Rs 1000
[B] Rs 500
[C] Rs 750
[D] Rs 900

5) What equal annual installment will discharge a debt of Rs. 2985 due in 6 years at 10% simple interest?

[A] Rs 349
[B] Rs 453
[C] Rs 398
[D] none