Question
The ratio of age of A and his son is 5:2. If the
difference of their ages 4 year ago is 21, then find the sum of ages of A and his son 9 year hence? TYPE 44Solution
Let the present age of Raman and his son be 5x and 2x respectively. => 5x – 2x = 21 ∴  x = 7 Required sum = 7 × 7 + 18 = 67 years
Pipe ‘A’ and pipe ‘B’ can fill a cistern in 20 minutes and 15 minutes respectively. Pipe ‘C’ alone can empty the cistern in 12 minutes. If a...
24, 29, 62, ?, 758, 3791
...Matthew sells Chocolates in the packs of 6 chocolates, 12 chocolates, 18 chocolates and 24 chocolates etc, but the rate is necessarily uniform. One day ...
If the standard deviation of a population is 5.5, what would be the population variance?
14, 28, 56, 112, ...... The sum of first 10 numbers in the series is:
The ratio of length and breadth of a rectangular field is 5:9. If the total cost of surrounding it at the rate of Rs 7.50 per meter is Rs 4200, then fin...
The fourth term of an arithmetic progression is 6. Then the sum of first seven terms is:
What is the median of the following list of numbers: 5, 3, 6, 9, 11, 19,12,20, and 1?
What is least number which when successively divided by 6, 4 and 4 leaves a remainder 5, 3 and 3 respectively?
Find the mode of the data: 2, 2, 3, 5, 15, 15, 15, 20, 21, 23, 25, 15, 23, 25.
Relevant for Exams:
