Question

the digits at 10 place of a two digit number is 2 more than the twice the digit at the unit place if the product of digit is 24 find the two digit number

Answer 1

your answer: Let unit digit be x

Tens digit will be 2x

Then number = 2x×10+x (general form of a number as 54= 5×10+4)

20x+x-18= x×10+2x ( as digits interchanged)

21x-18=10x+2x

21x-18=12x

21x-12x=18

9x=18

X=18÷9

X=2

Unit digit-2

Tens digit-2×2=4

Number - 42

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