Question

the sum of the digits of a two digit no.is 7 .when the digits are reversed then no. Is decreased by 9 find the no.

Answer 1

Answer:

43

Step-by-step explanation:

by hit and trial method

Answer 2

Answer:

43

Step-by-step explanation:

first we find the combinations of digits which when added give 7.

they are...

1+6  

no. is 16 or 61 . when subtracted the remainder is not 9

2+5

no. is 25 or 52 .when subtracted remainder is not 9

3+4

correct.

0+7

not possible no. is 70 or07 when subtracted ans. is not9

4+3=7

when digits are reversed we get the number as 34 . and 34 subtracted from 43 gives 9 . thus proven