Question
The combined average age of M, F, and S was 54 years
when S got married. After 6 years, an infant was born. The average age of the family, 12 years post-marriage, is now 48 years. Calculate the age of the bride at the time of the marriage.Solution
ATQ,  Total present age of M, F and S  = 54 × 3 + 12 × 3  = 162 + 36  = 198 years.  Sum of present age of family  = 48 × 5  = 240 years  Age of child = 6 years  So, age of bride at the time of marriage  = 240 – 198 – 6 – 12  = 24 years
What is the average of first 32 multiples of 3.2?
- Let ‘p’ denote the number of primes from 1 to 30, and ‘q’ be the number of prime numbers in the range 31 to 50. What is the product p × q?
Find the smallest integer greater than 100 which leaves remainder 4 when divided by each of 5, 6 and 7.
When the digits of a two-digit number are interchanged, the new number becomes 2 more than 200% of the original number. If the sum of the digits is 7, f...
Find the median of 2, 8, 6, 6, 7, 9, 5, 12 and 13.
If the first term of a geometric progression (GP) is 12 and the common ratio is 4, then find the sum of its 4 terms.
Find the unit digit in (257)45 × (248)73.
Divide 45 into 4 parts such that if the first is increased by 2, the second is decrease by 2, the third is multiplied by 2 and the fourth divided by 2, ...
Find the range of the given data:
110, 135, 120, 95, 105, 115, 125, 140
Find the third proportion of 38 and 19.