Question

What is the largest odd number that is a factor of $860$?

• A. $143$
• B. $115$
• C. $215$
• D. $243$

Answer 1

The correct option is C $215$

Factorisation of $860=$ $2\times 430=2\times 2\times 215$

$215$ is an odd number, so the largest odd number factor of $860$ is $215$.