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656 . A person closes his account in an investment scheme by withdrawing Rs. 10,000. One year ago, he had withdrawn Rs. 6,000. Two years ago he had withdrawn Rs. 5,000. Three years ago he had not withdrawn
A. Rs. 15,600 B. Rs. 16,500
C. Rs. 17,280 D. None of these

657 . Vikram borrowed Rs. 6,450 at 5 per cent simple interest repayable in 4 equal instalments. What will be the annual instalment payable by him?
A. Rs. 1,710 B. Rs. 1,810
C. Rs. 1,910 D. Rs. 1,860

658 . Subbarao was approached by two neighbours for loan. He had Rs. 2,540, a part of which he lent to one person at 12% interest per annum, and the other part was lent to the second person at 12.5%. At the
A. Rs. 1,360 B. Rs. 1,340
C. Rs. 1,240 D. Rs. 1,180

659 . Two equal sums of money are lent at the same time at 8% and 7% per annum simple interest. The former is recovered 6 months earlier than the later and the amount in each case is Rs. 2,560. The sum and
A. Rs. 1,500, 3.5 years and 4 years
B. Rs. 2,000, 3.5 years and 4 years
C. Rs. 2,000, 4 years and 5.5 years
D. Rs. 3,000, 4 years and 4.5 years

660 . Arun borrowed a sum of money from Jayant at the rate of 8% per annum simple interest for the first four years, 10% per annum for the next 6 years and 12% per annum for the period beyond 10 years. If h
A. Rs. 12,000 B. Rs. 10,000
C. Rs. 8,000 D. Rs. 9,000