Question
The average age of A and B is 17 years. If A is to be
replaced by C, the average would be 16 years. The average age of C and A is 18 years. Find the age of A.Solution
A + B = 2 × 17 = 34 yr B + C = 2 × 16 = 32 yr C + A = 2 × 18 = 36 yr On adding all three, 2 (A + B + C) = 34 + 32 + 36 = 102 ⇒ A + B + C = 51 ∴ A = (A + B + C) – (B + C) = 51 – 32 = 19 yr
564.932 + 849.029 – 425.08 = 612.095 + ?
999.99 + 99.99 + 99= ?
A sum of ₹60,000 is invested at a compound interest rate of 'x%' per annum, compounded annually, and grows to ₹75,264 in 2 ye...
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
³√? × 33.97 + 59.99 × 28.9 – 48.98 × 21.42 = 1085.344
1279.98 ÷ 40.48 × 10.12 = ? × 2.16
(124.901) × (11.93) + 219.95 = ? + 114.891 × 13.90
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
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