Solving problems depends purely on IQ, logic and reasoning.

The problem is creativity and talent.

The problem solver just climbs a ready-made ladder. Problem solvers should not only make their own ladders, but also consider the feelings of climbers.

It is easy to work out a math problem, but it is difficult to work out a math problem that others can't. Your question must be out of the habitual thinking of the problem solver, it must be difficult and innovative. This level of problem solving depends largely on inspiration and talent.