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Mathematics · 2023 · 1 mark
CBSE 2023 · Region 5 · Set 1 · Q20
Assertion (A): The number 5^n cannot end with the digit 0, where n is a natural number. Reason (R): Prime factorisation of 5 has only two factors, 1…
Assertion $\displaystyle (A)$ : The number $\displaystyle 5^{\mathrm{n}}$ cannot end with the digit $\displaystyle 0$, where n is a natural number.
Reason (R): Prime factorisation of $\displaystyle 5$ has only two factors, $\displaystyle 1$ and 5.
Official answer
(C)
Assertion (A) is true, but Reason (R) is false.
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CBSE Class 10 Mathematics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.