Can you solve the following math problem in your head?
47 x 61
What if you instead changed it to this?
50 x 58 - 3 x 11

How about this one?
138²
Does this make it easier?
63 x 300 + 12²

This one seems hard, right?
259 x 781
How about now?
250 x 808 + 9 x 31

Learn these tricks and many more by buying the "How To Be A Math Genius" book or downloading the Android app!