"No more than 3" is "< 3" not </= 3 ?

Both are correct as both satisfies the condition that it is not more than 3". Being equal to 3" satisfies the condition that it is not more.

One is correct the other is not.

No more than 3 means less than or equal to 3.

<3

Rap

it can mean either in this case
in a maths question
this <3 mean anything below three but not three
this <_ with the straight line underneath '<'means less than or equal to