CUET Mathematics 2025 26 May Shift 2 PYQs

Which of the following functions from $\mathbb{Z}$ to $\mathbb{Z}$ is a bijective function? (where $\mathbb{Z}$ is set of integers)

Let a relation R = {(a, b) : a is a factor of b, a, b $\in$ N}. Then, R is ______.

Let $f: \mathbb{R} o \mathbb{R}$ be defined as $f(x) = [x]$, where [x] denotes the greatest integer less than or equal to x. Then which of the following statements are correct?

(A) f is one-one but not onto

(B) f is not onto

(C) f is not one-one

(D) f is one-one and onto

Choose the correct answer from the options given below: