The average age of A and B is 22 years. If A is to be replaced by C, the average would be 21 years. The average age of C and A is 23 years. Find the age of A.
A + B = 2 × 22 = 44 yr. B + C = 2 × 21 = 42 yr. C + A = 2 × 23= 46 yr. On adding all three, 2 (A + B + C) = 44 + 42 + 46 = 132 ⇒ A + B + C = 66 ∴ A = (A + B + C) – (B + C) = 66 – 42 = 24 yr.
Kiran, Pihu, Siya, Leena, Reena and Jiya are sitting around a circular table facing the centre. Kiran sits 3rd to the right of Pihu. Siya sits 2nd to th...
If 20 – 10 means 200, 8 ÷ 4 means 12, 6 × 2 means 4, then 100 – 10 × 1000 ÷1000 + 100 × 10 =?
What should come in place of ? in the given series based on the English alphabetical order?
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Second row - 9,...
