# Is a prime number whose sum of the digits is 11?

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## Is a prime number whose sum of the digits is 11?

2 + 35 * 711 is prime. 1111 contains exactly two embedded elevens. The 11th prime times π(11) has a digit sum of 11.

What are the prime numbers under 40?

1,2,3,5,7,11,13,17,19,23,29,37 .

What are the prime numbers up to 11?

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.

### How is 30 a prime number?

Is 30 a Prime Number? The number 30 is divisible by 1, 2, 3, 5, 6, 10, 15, 30. For a number to be classified as a prime number, it should have exactly two factors. Since 30 has more than two factors, i.e. 1, 2, 3, 5, 6, 10, 15, 30, it is not a prime number.

How many prime numbers are there between 11 and 40?

List of Prime Numbers From 1 to 50

Range of prime numbers Quantity Prime numbers
Prime numbers from 11 to 20 4 11, 13, 17, 19
Prime numbers from 21 to 30 2 23, 29
Prime numbers from 31 to 40 2 31, 37
Prime numbers from 41 to 50 3 41, 43, and 47

What are the prime numbers between 12 and 40?

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31 and 37.

#### What are the composite numbers between 1 and 11?

4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100.

What are the prime numbers between 40 and 70 and whose sum?

The numbers between 40 and 70 with digit sum 7 are 43, 52, 61, and 70. Of these, 52 and 70 are divisible by 2. 43 and 61 are prime. To get a sum of 7, we have 43 52 61 as three options between 40 and 70.

Which is an example of a prime number?

A prime number (or a prime) is a natural number that has exactly two distinct natural number divisors: 1 and itself. For example, there are 25 prime numbers from 1 to 100: 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.

## How to get the rightmost digit of a number?

Get the rightmost digit of the number with help of the remainder ‘%’ operator by dividing it by 10 and add it to sum. Divide the number by 10 with help of ‘/’ operator to remove the rightmost digit.

How many prime numbers are there in the world?

List of Prime Numbers Sequence Prime Number 8 19 9 23 10 29 11 31