Two dice are tossed. What is the probability that the total score is a prime number.

How many different 8 letter words are possible using the letters of the word SYLLABUS?

Let '*' and '^' be two binary operations such that a * b = a2b and a ^ b = 2a + b. Find (-4 * 2) ^ (7 * -1).

The population of a village decreased from 1,230 to 1,040 due to breakout of an epidemic. What is the percentage decrease in the population?

Evaluate: 160.16 × 160.04 × 20.2

The area A of a circle is increasing at a constant rate of 1.5 cm2s-1. Find, to 3 significant figures, the rate at which the radius r of the circle is increa...

Make x the subject of the formula:

The interior angle of a regular polygon is five times the size of its exterior angle. Identify the polygon.

Evaluate: