Question
The combined current ages of A, B, and C amount to 75
years. Five years from now, A's age compared to C's will be in the ratio of 5:7. Currently, B is 25% older than A. Calculate the total ages of B and C two years ago.Solution
Let the age of 'A' and 'C' 5 years hence form now be '5x' years and '7x' years respectively. So, the present age of 'B' = {(5x - 5) X (5/4) } years ATQ, (5x - 5) + (7x - 5) + {(5x - 5) X (5/4) } = 75 Or, 12x - 10 + 6.25x - 6.25 = 75 Or, 18.25x = 75 + 16.25 So, 'x' = (91.25 ÷ 18.25) = 5 So, Age of 'B' 2 years ago from now = 25 - 2 = 23 years Age of 'C' 2 years ago from now = 30 - 2 = 28 years Therefore, required sum = 28 + 23 = 51 years
(√ 121 x 41) + (3√343 x √289 ) = ? x 19  Â

7, 8, 12, 21, 37, ?
Evaluate: 72 ÷ 6 × (5 + 1) − 8² + 10
What will come in the place of question mark (?) in the given expression?
(30 × 5 + 20) × 2 = ?
What will come in the place of question mark (?) in the given expression?
737 + 149 - ?²- 367 = 14 X 25(√ 1444 ÷ 5) × 3.25 = ?
522 + 160% of 80 - 130 = ? X 13Â
54% of 250 = 6 × 21 + √?
300% of (3341 – 471) = ? × (√4225/195)