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Number properties question
Source: Beat The GMAT — Quantitative Reasoning |
Hi,
You could have just edited your opening post. You don't to post 3 posts for a single question.
X10X - For a number to be divisible by 4, the last two digits should be divisible by 4
that is 0X is divisible by 4
So, X can be either 4 or 8
For a number to be divisible by 9, the sum of digits should be multiple of 9.
So, x+1+0+x = 2x+1 is divisible by 9
for x=4, 2x+1 = 9
for x=8, 2x+1 = 17(not divisible by 9)
Hence, C
Actually, the options here are in such a way that when you arrive know that 0x should be divisible by 4, you can straight away pick C
You could have just edited your opening post. You don't to post 3 posts for a single question.
X10X - For a number to be divisible by 4, the last two digits should be divisible by 4
that is 0X is divisible by 4
So, X can be either 4 or 8
For a number to be divisible by 9, the sum of digits should be multiple of 9.
So, x+1+0+x = 2x+1 is divisible by 9
for x=4, 2x+1 = 9
for x=8, 2x+1 = 17(not divisible by 9)
Hence, C
Actually, the options here are in such a way that when you arrive know that 0x should be divisible by 4, you can straight away pick C
Cheers!
Things are not what they appear to be... nor are they otherwise
Things are not what they appear to be... nor are they otherwise
Hi,sukh wrote:the four digit no is divisible by 36 not 4 , i tried to solved by 36= 6*6 i.e. divisble by 2 and 3
but didnt get the point how to solve equations , can You plz explain it again with 36
I have explained it for 36 only. If the number is divisible by 36. It has to be divisible by both 4 and 9.
Cheers!
Things are not what they appear to be... nor are they otherwise
Things are not what they appear to be... nor are they otherwise
