Q141 of 200 Page 5

2 is the only _____ number which is even.

2 is the only prime number which is even.

Prime numbers are those numbers which have only two factors 1 and the number itself.

139

A number for which the sum of all its factors is equal to twice the number is called a _____ number.

140

The numbers having more than two factors are called _____ numbers.

142

Two numbers having only 1 as a common factor are called numbers.

143

Number of primes between 1 to 100 is _____.