Paper Test Q.1

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bbaah: Senior | Next Rank: 100 Posts; Posts: 35; Joined: Fri Aug 22, 2008 7:26 am; Location: Accra, Ghana; Thanked: 1 times; GMAT Score:720

by bbaah » Fri Sep 26, 2008 6:28 am

How 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

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Source: Beat The GMAT — Problem Solving | Fri Sep 26, 2008 6:28 am

manulath: Senior | Next Rank: 100 Posts; Posts: 35; Joined: Tue Sep 09, 2008 10:12 pm; Location: Lko; Thanked: 3 times

by manulath » Fri Sep 26, 2008 6:52 am

Ans E:1339

458600-342700 = 133900

tens dig= 1, uniits =3
last two digits as 13

that will one every 100

hence total numbers = 1339

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vishubn: Legendary Member; Posts: 574; Joined: Sun Jun 01, 2008 8:48 am; Location: Bangalore; Thanked: 28 times

by vishubn » Fri Sep 26, 2008 6:53 am

Hi

I think similar kinda problem was discussed yesterday let see if i can get this right..

Number of digits between 324,700 and 458,600 is found out first

that is 458600-324700 which is 133900
so now the possibility of integer with tens digit as 1 and units digit 3 which is number 13 and it is possible only once in ever 100 number

now, there 133900 numbers and 13 is possible only once so the answer is

1339
Hope it helps
Vishu

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bbaah: Senior | Next Rank: 100 Posts; Posts: 35; Joined: Fri Aug 22, 2008 7:26 am; Location: Accra, Ghana; Thanked: 1 times; GMAT Score:720

E is correct

by bbaah » Fri Sep 26, 2008 7:35 am

Thanks,

That helps.

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