I am thinking of a 4 digit number. When i swop the digit in the tens place and the hundreds place , the difference between the 2 numbers is 720. Given that the digit 3 and 2 are in the thousands place and ones place respectively, fund the number.
ssara:
the difference between the two unknown digits is 8........................if any other information is given further than the exact digits will come
please do let me know your response to this
Thnk you . Whats the exact 4 digit num ?
that's the thing i didn't get .......i just got the differnce between the digits
I will give the solution to what i got
3912 is the answer
How u got it ?
i have given the solution
the last equation solving has been done by trial and error
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ANSWER
3912
STEP BY STEP EXPLAINATION
according to the question the number should be 3xy2
where x and y are the unknown digits.
upon expanding it, and according to the given condition in the question;
(3*1000+x*100+y*10+2)-(3*1000+y*100+x*10+2)=720
100x+10y-100y-10x=720
90x-90y=720
x-y=8
by hit trial method; we find that
x=9
y=1
therefore number=3912
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