In a school, $${3\over 8}$$ of the number of students are girls and the rest are boys. One-third of the number of boys are below 10 years and $${2\over 3}$$ of the number of girls are also below 10 years. If the number of students of age 10 or more years is 260, then the number of boys in the school is:

If the loss is 20%, by what fraction should the selling price be multiplied to get the cost price?

Two numbers are, respectively, 10% and 25% more than the third number. The ratio of the two numbers is:

The table below shows the number of cakes sold by six different bakeries in a town on five different days of particular week.

What is the total number of cakes sold by the bakery D on Monday, Thursday and Sunday, taken together?

A person has to cover a distance of 160 km in 15 hours. If he covers $${4\over 5}$$ of the distance in $${2\over 3}$$  of the time, then what should be his speed (in km/h) to cover the remaining distance in the remaining time?

What is the smallest digit that must be added to the product 5786 × 5784 to make it a perfect square?

The number of boys in a class is 16% more than the girls, what is the respective ratio of the number of boys to the number of girls in the class?

The side of a trapezium pyramid with a square base is 24 cm. and its height is 5 cm. What will be the area of its oblique surface in cm²?