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661 . A sum of Rs. 1,440 is lent out in three parts in such a way that the interest on first part at 2% for 3 years, second part at 3% for 4 years and third part at 4% for 5 years are equal. Then the differ
A. Rs. 400 B. Rs. 560
C. Rs. 460 D. Rs. 200

662 . A sum of Rs. 18,750 is left by will by a father to be divided between two sons, 12 and 14 years of age, so that when they attain maturity at 18, the amount (principal + interest) received by each at 5
A. Rs. 9,500, Rs. 9,250 B. Rs. 8,000, Rs. 1,750
C. Rs. 9,000, Rs. 9,750 D. None of these

663 . Pratibha invests an amount of Rs. 15,860 in the names of her three daughters A, B and C in such a way that they get the same interest after 2, 3 and 4 years, respectively. If the rate of simple intere
A. (1/15): (1/10): (1/20)
B. (1/10): (1/15): (1/20)
C. (1/15): (1/20): 10
D. None of these

664 . What should be the least number of years in which the simple interest on Rs. 2,600 at 6(2/3)% will be an exact number of rupees?
A. 2 B. 3
C. 4 D. 5

665 . An automobile financier claims to be lending money at simple interest, but he includes the interest every six months for calculating the principal. If he is charging an interest of 10%, the effective
A. 10% B. 10.25%
C. 10.5% D. None of these




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