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In a two-digit number, the tens digit is...

In a two-digit number, the tens digit is twice the units digit. If the sum of its digits is 9. Find the number

A

63

B

82

C

72

D

36

Text Solution

Verified by Experts

The correct Answer is:
a
Let the number of be ab.
`a = 2b ("given") rarr (1)`
`a + b = 9 ("given") rarr (2)`
`rArr` From Eqs (1) and (2), we get `3b = 9`
`rArr b = 3`
`a = 6`
`rArr` The number is 63
hence, the correct option is (a)
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