Let the digit at unit place be y and digit at ten's place be 2y [∵ Digit at tens place = twice the digit at units place]
Now if digits are reversed, then :
∴ Original number = 21y
= 21(2)
= 42
Therefore,
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Given :
To find :
Solution :
Let the digit at unit place be y and digit at ten's place be 2y [∵ Digit at tens place = twice the digit at units place]
Now if digits are reversed, then :
Now atq,
∴ Original number = 21y
= 21(2)
= 42
Therefore,