Question

Study the set of numbers given and answer the question which follow:
$427$ $581$ $839$ $275$ $589$
If two is subtracted from the first digit of each of the numbers and then the first and the third digits are interchanged, which of the following will be the lowest?

• A. $427$
• B. $581$
• C. $839$
• D. $275$

Answer 1

The correct option is B $581$

1) $427$

2 is subtracted from the first digit ie $4$

we get, $4-2=2$,The number becomes $227$

Now interchanging first and third digit we get, $722$

2) $581$

$2$ is subtracted from the first digit ie $5$

we get, $5-2=3$,The number becomes $381$

Now interchanging first and third digit we get, $183$

3) $839$

$2$ is subtracted from the first digit ie $8$

we get, $8-2=6$,The number becomes $639$

Now interchanging first and third digit we get, $936$

4) $275$

$2$ is subtracted from the first digit ie $2$

we get, $2-2=0$,The number becomes $075$

Now interchanging first and third digit we get,$570$

5) $589$

2 is subtracted from the first digit ie $5$

we get, $5-2=3$,The number becomes $389$

Now interchanging first and third digit we get, $983$

The least modified number among all is $183$

Therefore the answer is $581$