Question

which is the average of all numbers from 1 to 100 that ends at 2?

Answer 1

Answer:

Group 2 with 92, 12 with 82, 22 with 72, 32 with 62, and 42 with 52. Each group can be further "split" into 47 and 47 (for example 2+92=47+47). So the average is 47.