integers

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hakyology: Senior | Next Rank: 100 Posts; Posts: 66; Joined: Tue Jun 05, 2007 1:39 pm; Thanked: 1 times

by hakyology » Mon Jul 07, 2008 7:56 am

hwo many integers between 324,700 and 458,600 have tens digit 1 and units digit 3?
A 10,300
B 10,030
C 1,353
D 1,352
E 1,339

the answer is E. please explain.Thank you.

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Source: Beat The GMAT — Problem Solving | Mon Jul 07, 2008 7:56 am

TRANGZON: Junior | Next Rank: 30 Posts; Posts: 22; Joined: Mon Apr 14, 2008 3:36 pm; Location: California; Thanked: 1 times

by TRANGZON » Mon Jul 07, 2008 12:43 pm

458 600 - 324 700 = 133 900

We need to find xxxx13

Each a hundred has one number has xxxx13

---> 133 900 : 100 = 1339

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