How many images can we see at a time by using two mirrors ?

How many times 3 is 9 ?

How many times 5 Is 30 ?

How many times 5 is 15 ?

How many 3-digit numbers can be formed by using the digits 1 to 9 if no digit is repeated?

Consider 12 points on a plane of which five are collinear. How many triangles can be formed using the 12 points?

How many 4 -digit numbers can be formed by using' the digits 1 to 9 'if repetitions of digits is not allowed?

Consider the word ANNAMALAI How many new words can be formed using the given words?

How many three digit number can be formed using the digits 1,2,3,4,5 if repetition is not allowed?