Which is lesser ??

 This question was asked on Koun Banega Karodpati program.

Question 

Which of these is lesser than centimeter  ??

1.  Decimeter 

2.  Millimeter 

3.  Kilometer 

4.   Meter

Answer 

This question really needs mathematical knowledge  !!!!

We know cm is 10 to the power of  -2 meters.

Now we have to find out which one is lesser than cm.

We will take meter as standard reference.

Option 3 is kilometer.

==>>      kilometer   =  10 to the power of     +3  meters.

==>>       +3   is  higher than   -2.

Kilometer is ruled out.

Option  1  is decimeter 

==>>      decimeter  =  10 to the power of  -1  meters.

==>>        -1 is higher than -2.

==>>         We dont use the word  decimeter for    1/10 .

Decimeter is ruled out.

We don't use decimeter much nowadays.

Option 2 is millimeter.

==>>   millimeter = 10 to the power of    -3.

==>>  -3   is lower than  -2.

==>>  millimeter is lesser than centimeter.

Hence answer is  millimetre.