If n is a positive integer, what is the tens digit DS16085

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GMAT DS16085

If n is a positive integer, what is the tens digit of n ?

(1) The hundreds digit of 10n is 6.
(2) The tens digit of n + 1 is 7.

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😃 I never thought this way that multiplying a two digit no. With 10 will shift the tense digit to hundred. 👍

Abhishek-Sharma