Distance - Tricky Questions

Question 1

Andy was practicing for a marathon. Each week he ran, he increased his distance by 3km.
If he ran 8 km for the first week, after how many weeks will he be able to run 29km?

Answer 1

1st=8km
2nd= 8+3=11
3rd= 11+3=14
4th= 14+3=17
5th=17+3=20
6th=20+3=23
7th=23+3=26
8th=26+3=29

The 8th week is the answer

Question 2

30 billboards, each 3m wide are placed along a street 525m in lenght. If the billboards were equally spaced, what was the distance from one billboard to the next?

Answer 2

1