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Subjects>Math>Math & Arithmetic

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

Anonymous

∙ 12y ago

Updated: 11/1/2022

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.

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