Super brain test: a very hot test. It is said that people above IQ 125 know the answer. ...

I'll tell you what to do. There are two solutions:

Solution 1: Remove the equal sign and subtract the next number from the previous number.

972-856= 1 16

856-742= 1 14

742-630= 1 12

630-520= 1 10

To get a formula that starts with three:

520-4 12= 108

4 12-306= 106

The number is 306, plus the equal sign, it is: 3=06, so 3=6.

Solution 2: That's what they said. Don't think too complicated. This is sheer nonsense. Just have fun.