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The sum of the digits of a 2-digit number is 12. If the number formed by reversing it's digits is grater than the original number by 18. Find the original number.

Posted by Kumar R 8 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Hans Raj 8 years, 6 months ago

let no be xy

x+y=12 ....... i

10y+x - 10x-y = 18

9y - 9x = 18...... ii

from i and ii

9(12 - x) - 9x = 18

108 - 9x - 9x = 18

-18x = - 90

x=5

y=7

two digit no is 57

check ur answer 5+7=12 , 75 - 57 = 18 .......... Great , ........... r u happy or overjoyed tell me

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Don't post personal information, mobile numbers and other details.
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CBSE > Class 09 > Mathematics