Question
All the soldiers are arranged in the form of an
equilateral triangle i.e. one soldier in the front and 2 soldiers in the second row and 3 soldiers in the third row. 4 soldiers in the fourth row and so on. If 669 more soldiers of another company are added in such a way that all the soldiers now are in the form of an square and each of the sides then contain 8 soldiers less than each side of equilateral triangle. Initially, how many soldiers were there?Solution
The correct answer is B
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