Question

How can we find that wheater 205 and 206 are conecutive numbers ?

Answer 1

Consecutive numbers are numbers that follow each other in order. They have a difference of 1 between every two numbers. If n is a number, then n, n+1, and n+2.
for example 1,2,3 are consecutive numbers, as they come one after the other.
Similarly 205,206 are consecutive as they follow the other in that order. If we add 1 to the first number, we should get the next number.
For example
205+1= 206
206+1= 207
207+1= 208
Hence 205,206,207,208 are all consecutive set of numbers.