A monument is built out of toothpicks. There are 25 rows and each row has eight more toothpicks than the row above. The top row has five toothpicks.

Part 1: How many toothpicks are on the bottom row?

Part 2: Using complete sentences, explain the procedure taken to answer this question.

Question

A monument is built out of toothpicks. There are 25 rows and each row has eight more toothpicks than the row above. The top row has five toothpicks. 

Part 1: How many toothpicks are on the bottom row? 

Part 2: Using complete sentences, explain the procedure taken to answer this question.

anonymous · Answer

top row is first row for now...
in second row we have 5+8
in third 5+8+8
in n-th 5+8*(n-1)
so in 25th we have 5+8(24)=197 toothpicks

anonymous · Answer

oh wow thanks so much for also providing an explanation! (: