UPSC 2016 CDS II Math Paper

LCM of 2, 3, 4, 5 and 6 = 60
Also, Therefore, the numbers in set A are of the form 60k−1.
When k=1,60k−1=60−1=59
When and so on.
∴ A = {59, 119, 179, ...}
Thus, the number of integers between 0 and 100 belonging to the set A is one.