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Subjects>Math>Math & Arithmetic

How many 4's are used to write all two digit prime numbers?

Updated: 11/1/2022

Wiki User

∙ 12y ago

Best Answer

Well, if you think about it, a prime can never end in 4, because then it would be divisible by 2.

So the only numbers you need to check are 41, 43, 45, 47, and 49. Can you take it from there?

Wiki User

∙ 12y ago

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Q: How many 4's are used to write all two digit prime numbers?

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Continue Learning about Math & Arithmetic

How many two digit prime numbers are there?

There are 21 two-digit prime numbers.

How many three digit numbers have odd prime number as 1st digit A prime number as 2nd digit and an odd number as 3rd digit?

There are 17 such numbers.

How many 4 digit numbers are all made of prime numbers?

24 of them.

How many two-digit prime numbers have four as one of their digits?

there are 4

How many two digit prime numbers are there between 1-100 such that they have digit 7 in their units place?

There are 5 of them.

Related questions

How many two digit prime numbers are there?

There are 21 two-digit prime numbers.

How many three digit numbers have odd prime number as 1st digit A prime number as 2nd digit and an odd number as 3rd digit?

There are 17 such numbers.

How many two digit prime numbers have a units digit of 7 and what are the prime numbers?

17, 37, 47, 67, 97

How many 5 digit prime numbers are there?

An on-line prime number chart ended at 10007. There are many more charts available for download. So the answer is that there are many five digit prime numbers.

How many 4 digit numbers are all made of prime numbers?

24 of them.

How many 2 digit prime numbers are there whose unit digit is greater its tens digit?

Ten.

How many 2 digit prime numbers are there?

There are 21 two-digit prime numbers. The first two-digit prime number is 11, and the last two-digit prime number is 97. Prime numbers are numbers greater than 1 that are only divisible by 1 and themselves.

How many single-digit prime numbers are there?

4: 2, 3, 5 and 7. 1 is not a prime.

How many positive prime numbers have a ones digit of 5?

Only one positive prime number has a 5 in the ones digit. That prime number is 5. All other numbers with a 5 in the ones digit are composite because they will be divisible by 5.

How many two-digit prime numbers have four as one of their digits?

there are 4

How many two digit prime numbers are there between 1-100 such that they have digit 7 in their units place?

There are 5 of them.

HOW MANY PRIME NUMBERS ARE THERE FROM ONE TO HUNDRED THAT HAVE THE DIGIT TWO IN IT?

3 numbers 2, 23 and 29

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