Question
A is younger than B by 4 years. If the ratio of A and B
ages is 5:7 respectively, then find the age of A.Solution
If B’s age be x years, then A’s age be (x - 4) years. According to question, => (x – 4)/x = 5/7 => 7x – 28 = 5x => x = 14 Therefore A's age = 14 – 4 = 10 years
15 * 12 + 35% of 80 + 70% of 130 = ?
(0.125)³÷ (0.25)² x (0.5)² = (0.5)?-3
64.5% of 800 +  36.4% of 1500 = (?)² + 38
Simplify: 6(x³ − 2x² + 3x) − (x³ + 2x − 3).
125 + 30% of 250 + √576 = ?
24% of 400 × 16% of ? = 384
What will come in the place of question mark (?) in the given expression?
35 X 72 + 35 X 28 = ? X √16Â
(49 x ?) / 3.5 + 389 = 627
√? = 32% of 900 + 48% of 50
 Â
800 + 900 X (3)-2 - ? = 25 X 60 ÷ 2Â