Question

the one's digit of a two digit no is double the digit in ten's place if the um of the digit is 9 find the number

Answer 1

Step-by-step explanation:

Let x be the ten's digit.

One's digit =2x

Required number =x×10+2x

Also,

x+2x=9

⇒x= 9/3 =3

Therefore,

Required number =3×10+2×3=30=6=36

Hence the required number is 36.

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