PYQ - LCM of two numbers — task. Maths CBSE Live product, Class 10 (2026-27).

1. If two positive integers $y$ and $z$ can be expressed as $y = 20 a^3 b^2$ and $z= 30 a^4 b^5$, where $a$ and $b$ are prime numbers, then LCM $(y, z)$ is:

$60 a^{4} b^{5}$
$50 a^{4} b^{6}$
$70 a^{4} b^{5}$
$60 a^{5} b^{5}$

2. If the product of two co-prime numbers is $619$, then their HCF is :

$79$
$1$
619
$10$

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2. PYQ - LCM of two numbers

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