This is Chika Ofili.

He is the Nigerian prodigy who created his own mathematical formula at age 12.

Chika Ofili maths formula
Chika Ofili

His formula was tested with a lot of examples and it proved right.

Chika Ofili was presented with a Special Recognition Award for making a new discovery in Mathematics.

His dicovery was a formula for divisibility by 7.

Chika Ofili Maths formula

To use the formula, add the last digit of a number to the remaining and multiply it by 5.

Here’s a worked example.