Consider the series: 2, 3, 5, 7, 11, 13, 17, 19, 21, 23, 29
Find the number which is different from other similar numbers.
Answer & explanation
Correct answer: option 4
All these numbers are prime numbers 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 only 21 is odd as it is not a prime number.
Prime number is a whole number greater than 1 that cannot be exactly divided by any whole number other than itself and 1