This trick makes you look like your brain is a mega fast calculator!
Ask a friend to write down ANY three digit number such as 231 or 884. Ask them to multiply the number by
x 7x 11x 13 ...but even if your friend has used a calculator, you will have written down the answer ages ago! It's fiendish!
THE SECRET: all you do is write out the starting number twice! (i know, it's so easy and yet someone may think you have a calculator in your head)So 231 will become 231231 and 884 will become 884884. You don't believe it? Try it yourself ! It's really fun!
Welcome to a world where creativity, ingenuity, and mathematics mesh together to create Grade 10 Precalculus math.
