Question #df5d8
2 Answers
Explanation:
We know its less than 50 so our starting numbers are:
It’s not divisible by 2, so cross out even numbers:
It’s not divisible by 3 and the remainder has to be exactly 1 when divided by 3, so that leaves:
It’s not divisible by 5 and the remainder has to be exactly 1 when divided by 5, so that leaves:
Since the trees form two lines before there is one left over we know it can’t be
As per given condition of the problem the number of trees (say N ) is such that if 1 is subtracted from N then
So