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In a school with 400 students, the average age of the boys is 16 years and that of the girls is 12 years. If the average age of school is 14 years 9 m...
A student has two types of markers: Marker A priced at $3 each and Marker B priced at $5 each. If the student purchases a total of 12 markers, with an a...
5 positive numbers are written on a piece of paper. Sum of first 3 numbers is 55 and ratio of the 4th and the 5th number is 2:3. If difference between t...
The average age of A and B is 21 years. If A is to be replaced by C, the average would be 20 years. The average age of C and A is 22 years. Find the age...
Average of four numbers is 16. Sum of smallest and largest number is 45. If difference between other two numbers is 1, then find the square of second sm...
There are 4 numbers – A, B, C & D. B is 25% more than A and D is equal to average of A & C. Ratio of A to C is 3 : 4 and C is 5 more than B. Find valu...
Average age of A, B and C is 20 years. Average age of B and C was 12 years when A was born. If B is 21 years old, then, find the age of C, 6 years hence.
The average age of a class of 22 girls is 18 years. If 2 new girls having average age of 12 years join the class, then the average age of the class beco...
5 positive numbers are written on a piece of paper. Sum of first 3 numbers is 70 and ratio of the 4th and the 5th number is 2:3. If difference between t...
The average of 30 numbers was initially calculated as 45. However, it was later found that one of the numbers had been incorrectly recorded as 83 instea...