Q. A sum of money placed at compound interest doubles itself in 5 years. It will amount to eight times of itself at the same rate of interest in ?
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Q. If a : b = 3 : 8, find the value of (5a-3b) / (2a + b).
Q. The area covered by a square is 308 square cm. The length of the diagonal of the square is.
Q. If 20% of A = 30% of B = 1/6 of C, then A : B : C is -
Q. If the radius of a circle is decreased by 50%, find the percentage decrease in its area.
Q. A number exceeds 20% itself by 40. The number is ?
Q. The true discount on a bill of Rs. 2160 is Rs. 360. What is the banker's discount?
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