Question
A is younger than B by 5 years. If the ratio of A and B
ages is 7:8 respectively, then find the age of A.Solution
If Bβs age be x years, then Aβs age be (x - 5) years. According to question, => (x β 5)/x = 7/8 => 8x β 40 = 7x => x = 40 Therefore A's age = 40 β 5 = 35 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 =?