Question
A certain sum of money invested at R% p.a. fetches a
compound interest (compounded annually) of 1800 and simple interest of Rs.1600 at the end of 2 years. Find the value of ‘R’.Solution
Difference between compound interest and simple interest for 2 years = 1800 – 1600 = Rs.200 Simple interest for 1 year = 1600/2 = Rs.800 So, R = (200/800) × 100 = 25%
Find the range of the given data:
14, 28, 35, 21, 42, 56, 49
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Sum of squares of three consecutive numbers is 974. Find the sum of first and third number.
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In a question of division, if dividend is 21 times of remainder and quotient is 1/2 of divisor, if remainder is least multiple of 2 and 5 both then find...
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Find the value of: 37 × 25 + 37 × 75 without doing full multiplication separately.
Find the smallest number that should be multiplied to 720 so that it becomes a perfect square.
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