1. Number Sense
Extension: GCF and LCM using prime factorizations
Interactive practice questions
Consider the following prime factorisations:
$180=2\cdot2\cdot3\cdot3\cdot5$180=2·2·3·3·5
$600=2\cdot2\cdot2\cdot3\cdot5\cdot5$600=2·2·2·3·5·5
Find the greatest common factor of $180$180 and $600$600.
Easy
1min
Consider the following prime factorisations:
$224=2\cdot2\cdot2\cdot2\cdot2\cdot7$224=2·2·2·2·2·7
$196=2\cdot2\cdot7\cdot7$196=2·2·7·7
Easy
1min
Consider the following prime factorisations:
$4900=2\cdot2\cdot5\cdot5\cdot7\cdot7$4900=2·2·5·5·7·7
$1750=2\cdot5\cdot5\cdot5\cdot7$1750=2·5·5·5·7
Medium
1min
Consider the following prime factorisations:
$140=2^2\cdot5\cdot7$140=22·5·7
$24500=2^2\cdot5^3\cdot7^2$24500=22·53·72
Easy
1min
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