Brain training: What number is under the question mark? At f | Self-testing
Brain training:What number is under the question mark?
At first glance, this challenge doesn't look that difficult. However, practice shows that people with an IQ of 140 or higher can give the right answer.
All you have to do is answer one question: what number should be put in place of the "?" sign.
Can you solve it?
The correct one is here , but wait a while to check it out. It's much more fun to think for yourself and find the right answer.
