Question

find the ratio between HCF and LCM of 10 15 and 20 ​

Answer 1

$\left\begin{array}{r|c,c,c}2&10&15&20\\\cline{2-4}2&5&15&10\\\cline{2-4}3&5&15&5\\\cline{2-4}5&5&5&5\\\cline{2-4}&1&1&1\end{array}\right$

$LCM=2{\times}2{\times}3{\times}5$

$\implies\bf\,LCM=60$

$10=2{\times}5$

$15=3{\times}5$

$20=2^2{\times}5$

$\implies\bf\,HCF=5$

$\text{Now,}$

$HCF:LCM$

$=5:60$

$=1:12$

$\therefore\boxed{\textbf{HCF:LCM=1:12}}$

Answer 2

Answer:

here he does not written tow in ans hcf of 20

Step-by-step explanation: