22 (Exam Math ONET ก.พ.-65)

 Set

How to do

Answer 3

As far as the laws of mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality.

— Albert Einstein

21 (Exam Math ONET ก.พ.-56)

 Real Number

How to do

Answer 4

Mathematics as an expression of the human mind reflects the active will, the contemplative reason, and the desire for aesthetic perfection. Its basic elements are logic and intuition, analysis and construction, generality and individuality.

— Richard Courant