Question
The average age of three children is 32 years. If their
ages are in the ratio 3:6:7. Find the age of the youngest child.Solution
Total age of three children = 32 × 3 = 96 years Let their ages be 3x, 6x and 7x respectively. => 3x + 6x + 7x = 96 => 16x = 96 => x = 6 Therefore the age of youngest child = 6 × 3 = 18 years
What will come in place of (?) question mark in the following expression.
 (√1296 ÷ √36) × ? = 120
12 % of 72 × 25 – (x ÷ 20) × (16 ÷ 24) × 36 + 1/5 × x = (4 ÷ 12) × 36 ÷ 1/4
What should come in place of (?) question mark in the given expression.
(576 ÷ 12) + (3³ × 4) = ?
[564 + 32 of 18 × 9 ÷ 12 + 162 ] ÷ 4 = ?
(65% of 120) = 25% of ? - 22
?% of 320 = 40% of 40 × 5
What will come in the place of question mark (?) in the given expression?
(437 + ? - 167) x 2.5 = 875Simplify: 240 ÷ (5×3) + 18×2 − 7
{(? × 15) + (? × 45)} – 120 = 360
What value should come in the place of (?) in the following questions?
(1728)(1/3) + √441 + √1089 = ? × 5 + 11