CBSE 2025 · Region 4 · Set 1 · Q19 · 1 mark
Assertion (A) : $\displaystyle 4^{n}$ ends with digit $\displaystyle 0$ for some natural number $\displaystyle n$.
Reason (R) : For a number ' $\displaystyle x$ ' having $\displaystyle 2$ and $\displaystyle 5$ as its prime factors, $\displaystyle x^{n}$ always ends with digit $\displaystyle 0$ for every natural number $\displaystyle n$.
Official answer
From CBSE’s own marking scheme for this paper.
(D)
Assertion (A) is false but Reason (R) is true.
Real NumbersThe Fundamental Theorem of ArithmeticAnalyseassertion_reasonmedium
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CBSE Class 10 Mathematics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.