Apartment numbers...

Question

Two apartments have numbers that are consecutive interfere. The sum of the number is 59. What are the two apartment numbers?

Answer 1

using algebra...

n+n+1=59

2n+1=59

2n=58

n=29

n+1=30

29 and 30 (answer)

using arithmetic...

59/2=29.5 (this is the mean or the number in the middle of the two numbers)

29.5+0.5=30

29.5-0.5=29

29 and 30 (answer)