Question
Some lamp posts are placed along a street at equal distances.
The distance between the 3rd and the 6th lamp post is 15 m.
The distance between the 1st and the last lamp post is 35 m.
How many lamp posts are there altogether?
4 m

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Some lamp posts are placed along a street at equal distances.
The distance between the 3rd and the 6th lamp post is 15 m.
The distance between the 1st and the last lamp post is 35 m.
How many lamp posts are there altogether?