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What is the hundreds digit of a three digit number N

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What is the hundreds digit of a three digit number N  [#permalink]

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New post Updated on: 14 Jul 2018, 01:00
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What is the hundreds digit of a three digit number N ?

(1) N is multiple of 20

(2) The hundreds digit of N is 6 more than the units digit

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Originally posted by push12345 on 13 Jul 2018, 23:58.
Last edited by Bunuel on 14 Jul 2018, 01:00, edited 1 time in total.
Renamed the topic and edited the question.
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Re: What is the hundreds digit of a three digit number N  [#permalink]

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New post 14 Jul 2018, 00:22
push12345 wrote:
What is the hundreds digit of a three digit number N

1) N is multiple of 20

2)The hundreds digit of N is 6 more than the units digit



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let the number be abc

1) N is multiple of 20
there are so many three-digit multiples of 20
insuff

2)The hundreds digit of N is 6 more than the units digit
if number is 721, hundreds digit is 7
but if number is 872, or it can be 600
insuff

combined
we know it is multiple of 20, so units digit is 0
but hundreds digit is 6 more , so 0+6=6
suff

C
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1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


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Re: What is the hundreds digit of a three digit number N &nbs [#permalink] 14 Jul 2018, 00:22
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