Write all the 2digit numbers which when added to 27 get reversed
Answers
Answered by
118
let nos be 10X + Y, so the number is written as XY
for example, If it is 25, it is 10×2 + 5.
so our equation formed is
10X + Y + 27 = 10Y + X
9X + 27 = 9Y
X + 3 = Y
now the upper limit for a digit of a number is 9.
Y------X
9 6
8 5
7 4
6 3
5 2
4 1
We cant take X = 0 because if we did it wont be a 2 digit number.
So the numbers are
14
25
36
47
58
69
for example, If it is 25, it is 10×2 + 5.
so our equation formed is
10X + Y + 27 = 10Y + X
9X + 27 = 9Y
X + 3 = Y
now the upper limit for a digit of a number is 9.
Y------X
9 6
8 5
7 4
6 3
5 2
4 1
We cant take X = 0 because if we did it wont be a 2 digit number.
So the numbers are
14
25
36
47
58
69
coolleename:
Is there any other methods for them who don't know the use of X Y etc
Well then its trial and error
ask the second person whos answering, he or she is giving direct answer
X is just a variable, it is a number we have to find
Ya I knw bt students will confused what are X and y
I wrote it there in the answer, each of them represents a digit of the 2 digit number
like if it is 25, then X is 2 and Y is 5
but we dont know the number so we are trying to find it
Ya..bt trial method is so lengthy n time taking
thats why taking X and Y is faster and easier
Answered by
64
14,25,36,47,58,69 are all the two digit numbers which when added to 27 get reversed.
What is the best way to find these numbers without using variables..and trial method is too long
We simply find first two digit no.14 and when I taken other no.the other no. comes 25 and then I understood that the no.comes when I added it to 11.So,using this way (adding 11 )we simply find it.
Tell me one thank yaar please
Same logic doesn't work for all nos
it worked only for this question
Yaaa
Thanks Karo naaaaaaaaaaa
Thnks
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