Bunuel wrote:

The flying acrobatic team is made up of 120 airplanes. The team wants to form a rectangular formation with X planes in a row and Y planes in a column. If the number of airplanes in a row is no less than 4 and no more than 30, how many different combinations of rectangular shapes are possible?

A. 4.

B. 5.

C. 6.

D. 8.

E. 10.

If x are the rows and Y are the colums then

Total Number of Airplanes = X*Y = 120

i.e. X*Y = 1*120

2*60

3*40

4*30

5*24

6*20

8*15

10*12There are 5 combinations of X*Y but X and Y can be interchanged hence there are 10 possibilities for X as well as for Y

Answer: option E

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