first 3 ques answer plz
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2)the value of should be 5 the sum of digits should be divisible by 9
3) let the digits be x and y.
ATQ x+y=6 -------1
the original no 10x+y
reverse no 10y+x
10y+x-10x-y=18
x-y=2------2
from 1&2
x=4and y=2