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If the digit in the unit’s place of a two-digit number is halved and the digit in the ten’s place is doubled, the number thus obtained is equal to the number obtained by interchanging the digits. Which of the following is definitely true?

 

(a)

Sum of digits is a two-digit number

(b)

Digit in the unit’s place is half of the digit in the ten’s place

(c)

Digit in the unit’s place and the ten’s place are equal.

(d)

Digit in the unit’s  place is twice the digit in the ten’s place


Question ID - 54099 | Toppr Answer

If the digit in the unit’s place of a two-digit number is halved and the digit in the ten’s place is doubled, the number thus obtained is equal to the number obtained by interchanging the digits. Which of the following is definitely true?

 

(a)

Sum of digits is a two-digit number

(b)

Digit in the unit’s place is half of the digit in the ten’s place

(c)

Digit in the unit’s place and the ten’s place are equal.

(d)

Digit in the unit’s  place is twice the digit in the ten’s place

1 Answer - 5876 Votes

3537

Answer Key : (d) -

Let the ten’s digit be  and the unit’s digit be

Then, number =

New number =

So, the unit’s digit is twice the ten’s digit.



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