How many two digit prime numbers have a units digit of 7?

Answer 1

Two digit number with 7 as unit digit 7 are:

17, 27, 37, 47,57,67,77,87,97

we know that in 27 sum of digits =2+7=9

for 57=> 5+7=12

87=> 8+7=15

so 27,57 and 87 are divisible by 3

77=7*11 so 77 is divisible by 7 and 11

Thus 4 no are not prime

So the Prime number are:

17,37,47,67 and 97

Answer 2

There is only one two-digit prime number that has a units digit of 7, and that is 17. This is because all prime numbers greater than 2 are odd, and the only odd prime number ending in 7 within the two-digit range is 17.

Answer 3

Oh, what a happy little question! Let's think about it together. The only two-digit prime number with a unit digit of 7 is 17. It's like a little gem shining brightly in the vast mathematical landscape. Just remember, every number is special in its own way.

Answer 4

Oh, dude, you're testing my math skills now. Okay, let's see. So, the only two-digit prime number with a units digit of 7 is 17. So, the answer is just one. Easy peasy lemon squeezy.

Answer 5

5