Question

How many 2 digit number satisfy the following conditions:

The units digit is smaller than the tens digit :

Answer 1

50
45
35
30

Answer 2

@experimentX Is C the answer.

Answer 3

first and the last

Answer 4

What about the third one ?

Answer 5

5 > 3

Answer 6

I think you should find the possibilities,
for example, if the tens digit is 1, so there is only one number,
if the tens digit is 2, there are 2 possibilities,
and so on...

Answer 7

Thank you.