Source: Revised GRE PDF 2nd Ed. Section 6; #15 (p. 90)

2

How many different two-digit positive integers

How many different two-digit positive integers are there in which the tens digit is greater than 6 and the units digit is less than 4 ? 7, 9, 10, 12, 24

2 Explanations

1

Khyati Dalal

This question says....different two-digit positive integers. 0 is not the positive number. then why do we count it?

Apr 11, 2016 • Comment

Cydney Seigerman, Magoosh Tutor

Hi Khyati :)

Happy to help! We consider 0 as a possible value for the units digit or one's place of the two digit number. The units digit must be less than 4, so the possible values of the units digit are: 0, 1, 2, 3. For example, 70 is a two-digit number that meets the requirements in the question and has a units digit of 0. :)

Hope this clears up your doubts!

Apr 15, 2016 • Reply

2

Gravatar Chris Lele, Magoosh Tutor

Sep 27, 2012 • Comment

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