Question

which of the following is not a composite number 1. 133, 2. 433, 3. 533, 4. 833

Answer 1

all of above are composite number

Answer 2

Answer: Every number is a composite number.

Step-by-step explanation: A composite number is one which has divisors other than 1 and the number itself.

WE have the following divisors for the given numbers-

Divisors of 133 are 1, 7, 19, 133.

Divisors of 143 are 1, 11, 13, 143.

Divisors of 153 are 1, 3, 9, 17, 153.

Divisors of 833 are 1, 7, 17, 49, 119, 833.

Since all the numbers have 3 or more divisors, so all of them are composite.

All are composite.