Question
2 years ago, the average age of the family of 3 members
is 13 years. A baby is born now; the average age of the family is same as before. Find the age of the baby?Solution
The total present age of the family of 3 members = (13 x 3) + (2 x 3) = 45 A baby is born now; the average age of the family is same as before. The total present age of the family of 4 members (Including the baby) = 13 x 4 = 52 The age of the baby = 52 – 45 = 7 years
16.12 × 15.94 + 654.92 – 344.83 = ?× 5.95
82, 98, 130, 178, 242, ?
10296/72 + 3040 = (? × 4) + 1395
2.5Â Â Â Â Â Â Â Â Â 1.25Â Â Â Â Â Â Â 1.25Â Â Â Â Â Â Â 1.875Â Â Â Â Â 3.75Â Â Â Â Â Â Â ?
...10, 20, 60, 300, ?, 23100
18, 35, 68, 117, ?, 263Â
4    9    28    99    ?   2105   12660
...384, 357, 313, 252, 174, ?
66, 17, 81, ?, 100, -21Â
138, 140, 152, 174, ?, 248