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# Does reversing the order of the digits of a two digit prime number always result in a prime number?

Updated: 4/28/2022

Wiki User

8y ago

No, reversing the order of the digits of a two-digit prime number does not always result in a Prime number.

Wiki User

8y ago

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Q: Does reversing the order of the digits of a two digit prime number always result in a prime number?
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### Does reversing the order of the digits of a 2 digit prime number always result in a prime number?

No because as for example 23 is a prime number but 32 is a composite number

### Does reversing the order of thedigits of a 2 digit prime number always result in a prime number?

No. For example, reversing 23 gets 32.

### When 9 is added to a particular number the result is the same as the result of reversing the digits what is the number?

any of the following numbers works ...12, 23, 34, 45, 56, 67, 78, 89,

### What happens when you add subtract or multiply the digits in the number 42?

the result is always even

### Do you always get a prime number when you rivers a two digit prime number?

No, not always. When you reverse a two-digit prime number, the result may or may not be a prime number. It depends on the specific number you are reversing.

19

### 4.832 has 4 significant digits as a result of which rule?

As a result of the rule that you use the definition of the term - such as significant digits - when finding them for a number.

38

### Does a negative number minus a positive number equal a positive or a negative number?

It always is a negative number. The result will be the sum of the two digits with a minus sign in front of it, eg, (-4) - (+7) = -4 - 7 = -11.

### Why is the answer always a whole number when the sum of two digits under 10 are added together?

This follows from the property that the set of integers is closed under addition. This means that any two integers, when added together, must always result in a whole number.

Alberto

### How is 13 a happy number?

The sum of the squares of the digits of 13 is 12 + 32 = 10. The sum of the squares of the digits of this result is 12 + 02 = 1. Because this process results in a 1, this number is a happy number.