MATH FOR MECHANICS, CONSTRUCTION
& LANDSCAPING

A MECHANIC'S HELPER, who only knew feet & inches, WAS ASKED TO GET an 18mm wrench

Q.   WHAT SIZE IN INCHES IS THE WRENCH?

TO START OFF: Every (1/8 inch = apx. 3mm)

A.   The wrench in inches is (18/3 = 6) (6 X 1/8 = 6/8ths) - reduced - apx. a 3/4 inch wrench.