The current age of Mark's father is three times that of Mark's age. After five years the sum of their ages will be 90 years. What are their current ages?
The ratio of ages of Dhruv and Hiral is 3:4. After five years the ratio of their ages will be 4:5. What will be Dhruv's and Hiral's ages after five years?
Find the value 'x' in the following equation:
$$99 \times 21 - \sqrt{x} = 1968 $$
Find the digit in the unit's place for the following:
$$(124)^{112} + (124)^{143}$$
Mr. Rakesh has Rs. 90,000 in a savings account that earns him an interest of Rs. 5400 after two years. What is the rate of interest?
Find the value of 16.05 x 0.00001
Evaluate the following:
$$\frac{3.6 \times 0.48 \times 2.5}{ 0.12 \times 0.09 \times 0.5}$$
