IPMAT Indore (MCQ) PYQs

Let $P(X)$ denote power set of a set $X$. If $A$ is the null set, then the number of elements in $P(P(P(P(A))))$ is _________.

In a school $70\%$ of the boys like cricket and $50\%$ like football. If $x\%$ like both Cricket and Football, then

Let the set $P= \{2,3,4,..., 25\}$. For each $k ∈ P$, define $Q(k)= \{x ∈ P$ such that $x > k$ and $k$ divides $x\}$. Then the number of elements in the set $P - U_{k=2}^{25} Q(k)$ is