Best Trick to See if a Number is Divisible by Seven

The age old question has finally been answered. Is there an easy way to tell if a number is divisible by 7? Yes there is. The trick is not as easy as say 2, 3 or 9, but much simpler than doing the division yourself.

Watch this video to see how simple this trick is and why it works. Impress your friends at parties….

Corey Rasmussen

Corey is the Managing Director of the Mentored Engineer and owner of Rasmussen Designs. He received his BSME from Baylor University and holds a professional engineering license in North Carolina and Texas. He has been an engineer since 2002 with extensive experience in engineering design, fabrication and troubleshooting. He specializes in mobile equipment, hydraulic systems and machine design. He has two patents

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