Question
The average age of Mohan, his wife, his son and his
daughter is 24 years. His wife is just 5 years younger than Mohan himself and his wife was 25 years old when his son was born. He was 33 years old when his daughter was born. The average age of Mohan and his daughter age will be?Solution
Total sum of ages: The average age of Mohan, his wife, son, and daughter is 24 years, so their total sum of ages is 24×4=96 yrs Mohan's age = M Wife's age = M−5 Son's age = M−30 Daughter's age = M−33 Sum equation: M+(M−5)+(M−30)+(M−33)=96 for Mohan's age: 4M−68=96 M=41 years (Mohan's age) Daughter's age: 41−33=8 years. Average age of Mohan and his daughter: Sum = 41+8 = 49 Average = 49/2 =24.5 years. The average age of Mohan and his daughter is 24.5 years.
When a number is increased by 30% then the number obtained is 34 less than thrice the original number. Find the original number.
When the digits of a two-digit number are interchanged, the new number becomes 8 less than 150% of the original number. If the sum of the digits is 7, f...
S1 is a series of 5 consecutive multiples of 3 and S2 is a series of 4 consecutive multiples of 8. If the ratio of 3rd to 2nd terms in S1 is 6:5 and in ...
- How many numbers in the range from 50 to 500 are divisible by 3, 6, and 9?
There are three natural numbers which are pairwise co-prime. The product of the first two numbers is 105 and the product of the last two numbers is 255....
 Find the range of the given data:
18, 23, 36, 41, 55, 12, 62, 50, 48
There are balls of three colours: blue, green, and white. The number of green balls is 8 more than the average number of balls of each colour. The numbe...
When a least four-digit number 'x' is divided by 120, 100, and 80, it leaves a remainder of 15 in each case. What least number must be added to 'x' so t...
A certain number gives a remainder of 8 when divided by 17. What will be the remainder when four times that number is divided by 17?
Relevant for Exams:
