Question

If the digits in odd positions are interchanged,and the digits in the even position are interchanged,which of the following will be second least number?
a.4119
b.1974
c.9841
d.3619
​

Answer 1

Answer:

d

Step-by-step explanation:

3619

interchange 3 and 1

it will be 1639

inter change 6 anb 9

it will be 1936

Answer 2

Given :  digits in the odd positions are  interchanged, and the digits in the even  positions are interchanged,    

To Find : which of the  following will be the second least number

a.4119

b.1974

c.9841

d.3619

Solution:

digits in the odd positions are  interchanged, and the digits in the even  positions are interchanged,    

4119     => 1941      ( 4x1x interchanged  , x1x9 interchanged)

1974     =>7419      ( 1x7x interchanged  , x9x4 interchanged)

9841     =4198      (9x4x interchanged  , x8x1 interchanged)

3619    =>1936      (3x1x interchanged  , x6x9 interchanged)

1936     - least number

1941   - second least number

4198

7419  

1941  corresponds to  4119

4119  will be the second least number

option a is correct

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