Question

Consider two-digit numbers which remain the
same when the digits interchange their
positions. What is the average of such
two-digit numbers ?​

Answer 1

Answer:

29

Step-by-step explanation:

Answer 2

The numbers are 11, 22, 33, 44, 55, 66, 77, 88 and 99.

Their average = (11 + 22 + 33 + 44 + 55 + 66 + 77 + 88 + 99) / 9 = 495/9 = 55