Question

1. A postman delivers mail on Bolton Road.
Each house number on one side of the road is an even number.
The postman delivers to houses from house number 308 to house number 400
Work out the greatest number of houses between house number 308 and house number 400
………………………….

On the opposite side of the road each house number is an odd number.
The postman delivers mail to n houses on this side of the road.
He delivers mail to is house number 321, house number 323, and so on.
Write down an expression, in terms of n, for the least number of the final house.
………………………………….

Answer 1

since the house numbers are even on this thus the constant difference in house number is 2
hence the greatest number of houses between 308 and 400 is (400-308)/2+1=47
for the second part...
is it
319 +2n