in a two digit at the ten's place is twice the digit at unit's place.if the number obtained by interchanging the digits is added to the original number then sum=66.number=?
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Answer:let the digit is 2x X so effective number is 10*2x+X equal 21x reverse is 10*X+2x equal 12x total 33x equal 66 xequal 2 number 42
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