Advertisements
Advertisements
Question
Find if the following number is a prime number:
87
Advertisements
Solution
87
The divisors of 87 are 1, 3, 29 and 87 i.e. 87 has more than 2 factors. Therefore 87 is not a prime number.
APPEARS IN
RELATED QUESTIONS
What are composite numbers? Can a composite number be odd? If yes, write the smallest odd composite number.
What are twin primes?
Write all the pairs of twin primes between 50 and 100
Find if the following number is a prime number:
89
Are co-primes always primes? If no, illustrate your answer by an example.
Express the following number as the sum of two odd prime:
42
Express the following number as the sum of twin prime:
144
Which of the following is a prime number?
Find the prime numbers in the list given below.
22, 37, 43, 48, 53, 60, 91, 57, 59, 77, 79, 97, 100
The numbers 13 and 31 are prime numbers. Both these numbers have the same digits 1 and 3. Find such pairs of prime numbers up to 100.
Write five pairs of prime numbers less than 20 whose sum is divisible by 5. (Hint : 3 + 7 = 10)
