Question
The sum of the ages of a father and his son is 50 years.
After 5 years, the father's age will be twice that of his son. What are their present ages?Solution
Let the father's age be x years and the son's age be (50 - x) years. In 5 years, the father's age will be x + 5 and the son's age will be (50 - x) + 5 = 55 - x. According to the condition: x + 5 = 2(55 - x) x + 5 = 110 - 2x 3x = 105 x = 35 years (father), son = 50 - 35 = 15 years. Answer: c) Father: 35, Son: 15.
(22 × 52 ) + 4 × 6 = ? - √324
What should come in place of (?) question mark in the given expression.
 (25% of 320) + (3/8 of 400) − 30 = ?
(5832)1/3  × 10.11 × 11.97 ÷ 16.32 = ? + 45.022
82% of 400 + √(?) = 130% of 600 - 85% of 400
If (x + 1/x) = 5, then value of x3 + 1/x3 is:
Simplify: (1 ÷ 0.08)
What should come in place of (?) question mark in the given expression.
{ (144 ÷ 12) × 5 } − (18 ÷ 3) = ?
Simplify the following expressions and choose the correct option.
(3/4 of 256) + (2/5 of 150) - (72 ÷ 7)
464 + 181 +? = (154 × 25) - (15) 2 Â
15% of 1800 + 22 = ?Â
