Real Numbers

CBSE Class 10 · Mathematics · 40 past questions

These are the board's own papers. 154 more board questions reprinted in the books we use in class are for signed-in students: sign in.

10 of 40 · show all

Q23 2024

If $a = 2^2 \times 3^x$, $b = 2^2 \times 3 \times 5$, $c = 2^2 \times 3 \times 7$ and LCM $(a, b, c) = 3780$…
Q24 2024

Given HCF (2520, 6600) = 40, LCM (2520, 6600) = 252 $\times$ k, then the value of k is…
Q25 2024

A pair of irrational numbers whose product is a rational number is…
Q26 2024

Teaching Mathematics through activities is a powerful approach that enhances students' understanding and…
Q27 2024

If the HCF (2520, 6600) = 40 and LCM (2520, 6600) = 252 $\times$ k, then the value of k is
Q28 2024

If two positive integers $p$ and $q$ can be expressed as $p = 18a^2b^4$ and $q = 20a^3b^2$, where $a$ and $b$…
Q29 2024

Prove that $5 - 2\sqrt{3}$ is an irrational number. It is given that $\sqrt{3}$ is an irrational number.
Q30 2024

In a teachers' workshop, the number of teachers teaching French, Hindi and English are 48, 80 and 144…
Q31 2024 (Basic)

HCF $(132, 77)$ is…
Q32 2024 (Basic)

Two alarm clocks ring their alarms at regular intervals of 20 minutes and 25 minutes respectively. If they…