Find the average of a-1, a, a+2 and a+3.

The average of three numbers is 51. The second number is twice the first number, and the third number is three more than the second number. Find the average of 1^st two numbers.

Which of the following will completely divide 37683?

The average of 20 numbers is 227 and the average of other 30 numbers is 120. Find the average of all the numbers taken together.

Solve for (x)

26² + 15² = x² + 732.

Simplify $\frac{0.2\times 0.2\times 0.2+0.8\times 0.8\times 0.8}{0.2\times 0.2+0.8\times 0.8-0.16}$

Find the unit digit of 11 × 72 × 83?

Difference between the average of x, y and y, z is 8. Find the difference between x and z.

What is the remainder when 68241 is divided by 8?

$x+\frac{1}{x}=2$; Find $x^4+\frac{1}{x^4}$

Which of the following will completely divide 16807?

What is the remainder if 2891 is divided by 4?

Three years ago, the ratio of the age of Rishu and Ankita was 3:4, and after three years it will become 5:6. Find their present age.

If a # b = (3a – 2b) + (ab). Find 3 # 5. 

If a & b = $\left(\right. \frac{a}{2} + 2 b \left.\right)$(b + a). Find (4 & 2) + (2 & 1).