Question

what must be added to the smallest number formed by using the digits 1,3,5,4,2,7to get the sum as the greatest number formed by using the digits 2,5,7,8,9,0? Each digit is to be used once only while forming the numbers.
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Answer 1

by using the 0,9

by question 2+5+7+8+9+0=31

we add 1+3+5+4+2+7=22

we can subtract 31-22=9

then we have to add 9 no in 1 no's then 0and 9 are not used in the no's i can add 0+9 = 22+9 =31 answer