IQ test for everyone

Here is an IQ test everyone can participate in.

 If anyone wins the IQ test you will be gifted an iPhone 14 pro 

click on this link to participate: https://rb.gy/ozto

Test for everyone

1 + 2= 3

2 + 3= 6 

4 + 5= 11

6 + 7= 20, 

8 + 9= ?