Question
The average weight of βxβ group members is 56 kg.
The average weight of (x β 18) women is 55 kg, of (x β 20) children is 50 kg, and of (x β 22) men is 65 kg. Find the value of x.Solution
Total weight = 56 Γ x = 56x Women = 55 Γ (x β 18) = 55x β 990 Children = 50 Γ (x β 20) = 50x β 1000 Men = 65 Γ (x β 22) = 65x β 1430 Now, 56x = 55x β 990 + 50x β 1000 + 65x β 1430 56x = 170x β 3420 170x β 56x = 3420 114x = 3420 x = 30
4, 6, 12, 30, ?, 315, 1260Β
Find the missing term in the series:
1, 4, 9, 16, 25, ?, 49
36, 48, 24, 60, ?, 72
?, 15, 45, 225, 1575, 14175
What should come in place of (?) question mark in the given number series.
2, 6, 15, 31, 56, ?
10,14,26,42,70,?
53 × 38 + 32 × β54872 = ?
168, 164, 155, 139, ?, 78
18, 30, 46, 66, 90, ?
152Β Β Β Β 142Β Β Β Β 122Β Β Β ?Β Β Β Β Β 52Β Β Β Β 2