Which of the following will be the last digit of 7⁴⁸⁷?

The ratio of the age of Ajay and Atul is 4:5. After 5 years the ratio will be 5:6. Find the ratio of their age after 20 years.

Which of the following will completely divide 16807?

Which of the following will completely divide 20,683?

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

Which of the following will completely divide 13210120?

Find the approximate value 

$\frac{0.2 + 0.3 + \sqrt{0.24}}{\sqrt{0.2} + \sqrt{0.3}}$ 

Find the last digit of 9⁸¹ – 4¹⁶.

Find the value of x.

$(\sqrt{7744}-\sqrt{\mathrm{1521)}}=x^2$

The sum of three consecutive even numbers is 20 more than their average. Find the largest number.

Find the value of

$\left({25}^2-{24}^2\right)$

3 years ago the age of Rishu was 11 years. The ratio of the present age of Rishu and his father is 1:4. What will be his father’s age after 3 years?

Simplify $\frac{{(8+3)}^2-{(8-3)}^2}{24}$

The average age of 10 men increases by 5 years, when two new persons replace two of them whose ages are 40 and 44 years. Find the average age of those two new persons.

The average of four consecutive even numbers is 11. Find the largest number.