Two columns each of 'M' soldiers are marching, such that one column is – McqOptions

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1.	Two columns each of 'M' soldiers are marching, such that one column is behind the other. What is the value of 'M', if a soldier who is 21st from the front end is exactly behind another soldier, who is 20th from the rear end?
A.	20
B.	40
C.	39
D.	Such a case is not possible
Answer» D. Such a case is not possible

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