Found on YouTube: Only Genius can see the right number | IQ Test #math #short #math part 5

Only Genius can see the right number | IQ Test #math #short #math part 5
Maths at Your Fingertips
Only Genius can see the right number part 3 | IQ Test #math #short #math part 5.
https://www.youtube.com/watch?v=4032r8VtSXU