Single Digit Primes

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.

1-digit prime numbers are- 2, 3, 5, 7

Their sum is= 17

OMG !!! That's the answer !

:-) :-)

1 digit prime no. are- 2,3,5,7 so only add that ans is 17

Solution steps:

1. List all the 1-digit prime numbers.

2. Read the question. It says "sum of 1-digit prime numbers".

3. Add OR sum all the 1-digit prime numbers. You will get 17.

4. So, the answer is 17.

Don't understand? Read below.

Firstly, you need to list all the 1-digit prime numbers like this:

2, 3, 5, 7

There are 4 1-digit prime numbers that you have listed. Next, read the question again to ensure that you will don't get wrong.

What is the sum of all 1-digit prime numbers ?

The highlighted word is the keyword of the question. Now, you already have the 4 1-digit prime numbers. So, you can solve the problem above. How to solve? Add OR Sum like this:

2 + 3 + 5 + 7 = 17

You will get 17 if you don't calculate OR solve wrong. Now, you have an answer, that's 17.

2 + 3 + 5 + 7 = 17

We cannot include "1" during the addition since it is neither prime nor composite.

A prime number should be greater than 1 and always has exactly two positive divisors, itself and 1. 1 has only one positive divisor which is only itself.

A composite number always has more than two positive divisors and should be greater than 1. It cannot be written as a product of two factors, neither of which is 1.

its 2 + 3 + 5 + 7 = 17 , simple

2+3+5+7=17

2+3+5+7=17

1 digit prime numbers are following: 2, 3, 5, 7

sum of 1 digit number = 2 + 3 + 5 + 7 = 17

17 is the answer.

Números primos: (2,3,5,7...) Soma destes: 2+3+5+7=17

prime no must have exactly two divisors 1 and number itself.so,1 is not prime by this definition.

2+3+5+7=17

1-digit primes : 2, 3, 5 & 7 . So, sum of 1-digit primes = $2 + 3 + 5 + 7 =\boxed{17}$

1-digit prime numbers are 2,3,5,7. so the sum is 17

Prime numbers are 2,3,5,7

sum is 2+3+5+7 = 17

2+3+5+7=17 so,it's the answer

• Prime number = A Prime Number can be divided evenly only by 1, or itself. And it must be a whole number greater than 1. 1 digit prime numbers = 2,3,5,7 sum of all one digit prime numbers = 2+3+5+7 = 17 .