8 years ago, the average age of a family of six persons was 50 years. In between these 8 years the family adopted a girl. Now at present the average age of the family is same as it was 8 years ago. Find the present age of the girl.
Sum of the present age of the family excluding girl = 6 x (50 + 8) = 348 years Sum of the present age of the family including girl = 7 x 50 = 350 years Present age of the girl = 350 – 348 = 2 years
Find the value of x.
√441 ÷ 21+ √400 = 1 × x
(560 ÷ 32) × (720 ÷ 48) = ?
[(√576 × √144) ÷ √1296]2 = ? ÷ 3
(3/7) x 868 + 25% of 240 = (? + 65)
The value of ((0.27)2-(0.13)2) / (0.27 + 0.13) is:
2197 1/3 + 30% of 1800 = ?× 343 1/3
Simplify the following expression:
((32)4 - 1)/33×31× (210+1)
(7/4×18/21)+ (51/7× 28/17) + (25/2 × 48/10) =?
2222 ÷ 22 + 992 ÷ 16 + 650 ÷ 25 = ?
Find the simplified value of the following expression:
62 + 122 × 5 - {272 + 162 - 422}
