Question
The ratio of the present ages of P and Q is 8:5
respectively. If the age of P 10 years hence from now will be 100% more than the age of Q 4 years ago from now, then find the age of P 2 years ago from now.Solution
Let the present ages of P and Q be 8x and 5x years respectively. According to the question, => 8x + 10 = 2(5x β 4) => 8x + 10 = 10x - 8 => 2x = 18 => x = 9 Required age = 8x β 2 = 70 years
Evaluate:
β729 + β49 - β16 + 1/β64
Simplify:

(1/5)(40% of 800 β 120) = ? Γ 5
2/5 of 3/4 of 7/9 of 7200 = ?
`sqrt(5476)` + 40% of 1640 = ? `xx` 4 - 2020
? = (22% of 25% of 60% of 3000) + 21
Determine the simplified value of the given mathematical expression.
(342 β 20% of 5280) = ? Γ· 3
β157464 =?