Correct Answer - Option 3 : 37
The logic followed is:
All the given options except option (3) is a composite number whereas option (3) is a prime number.
Option 1: 15
It is a composite number.
Option 2: 27
It is a composite number.
Option 3: 37
It is a prime number
Option 4: 39
It is a composite number.
Hence, the correct answer is "37".
- Some facts about the Prime numbers:
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A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers.
- The only even prime number is 2. All other even numbers can be divided by 2.
- If the sum of a number's digits is a multiple of 3, that number can be divided by 3.
- No prime number greater than 5 ends in a 5. Any number greater than 5 that ends in a 5 can be divided by 5.
- Zero and 1 are not considered prime numbers.
- Except for 0 and 1, a number is either a prime number or a composite number. A composite number is defined as any number, greater than 1, that is not prime.
- Prime no between 1 to 100 are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.
