Identify the odd number in the series: 2, 3, 5, 7, 11, 13, 15.

₹0.0

Question: Identify the odd number in the series: 2, 3, 5, 7, 11, 13, 15.

Options:

Correct Answer: 15

Solution:

All numbers except 15 are prime numbers. 15 is not a prime number.

Identify the odd number in the series: 2, 3, 5, 7, 11, 13, 15.

Identify the odd number in the series: 2, 3, 5, 7, 11, 13, 15.

Step 1: Look at the series of numbers: 2, 3, 5, 7, 11, 13, 15.
Step 2: Understand what a prime number is. A prime number is a number greater than 1 that has no positive divisors other than 1 and itself.
Step 3: Check each number in the series to see if it is a prime number.
Step 4: 2 is prime (only divisible by 1 and 2).
Step 5: 3 is prime (only divisible by 1 and 3).
Step 6: 5 is prime (only divisible by 1 and 5).
Step 7: 7 is prime (only divisible by 1 and 7).
Step 8: 11 is prime (only divisible by 1 and 11).
Step 9: 13 is prime (only divisible by 1 and 13).
Step 10: 15 is not prime (it can be divided by 1, 3, 5, and 15).
Step 11: Since all other numbers are prime and 15 is not, 15 is the odd number in the series.

Prime Numbers – A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. The series consists of prime numbers except for one.