How many two-digit numbers are there such that the two digits differ by exactly two?

Question

asked Feb 11, 2022 95.7k views

1 Answer

Chuks · Answer 1 · 2022-02-17T00:33:21+0000

Answer:

Two-digit number ab: a = b + 2

20, 31, 42, ..., 97 ==> 8 numbers

b = a + 2, 8 numbers

8 + 8 = 16 numbers

Explanation: