hba

How many 2 digit number satisfy the following conditions:
The units digit is smaller than the tens digit :

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hba

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50
45
35
30

hba

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@experimentX Is C the answer.

experimentX

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first and the last

hba

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What about the third one ?

experimentX

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5 > 3

chihiroasleaf

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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...

hba

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Thank you.