1.

The digit at tens place is twice the digit at units place in a two-digit number.The number formed by interchanging the digits is 18 less than the originalnumber. Find the two-digit number.

Answer»

Hey!!!

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let the ten's digit be x and UNIT digit be y.

Then

ATQ,

=> x = 2y

And

=> 10x + y - 18 = 10y + x

=> 9X - 9Y = 18

=> x - y = 2

=> 2y - y = 2

=> y = 2

Thus x = 4

Original NUMBER = 42

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Hope this HELPS


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