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ICSE Class 10 Answered

A two digit positive number is such that the product of its digit is 6. If 9 is added to the number, the digits interchange their places. Find the number.
Asked by jaiswalsindhuli717 | 09 Feb, 2019, 01:18: PM
answered-by-expert Expert Answer
Let the digit be 10x+y
 
xy = 6...... (1)
10x+y+9 = 10y+x .......(2)
solve eqn (1) and (2) simultaneously
 
we get x = 2 and y =3
 
Therefore, the number is 23
Answered by Science Mate | 09 Feb, 2019, 03:51: PM

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