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Q.

A two-digit number is equal to three added to four times the total sum numbers. Add 18 to the numbers to swap the numbers. Find the number:

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a

b

c

d

answer is A.

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Detailed Solution

Concept-
The unit of the original number is x, and the tens place of the original number is y. Therefore, the original number is

Therefore, we use the statement that the two-digit number 3 is at least four times the sum of the digits to form the first equation. Swapping the numbers adds

which is equal to 18, to the original number, resulting in the second expression. Solve the equation to get the answer.
Let the tens and unit digit of number are

First condition:
Question Image

Question Image

Second condition :

Subtract resultant equations;

Two digit number

Hence, option 1 is correct.

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