So there is wall...the top has 1 brick, then the next row has 3 bricks, then 5 bricks etc. there are 2500 bricks in the wall then how many rows are there
im just really confused with arithmetic series right now and need general help with them too....
pref. without using some formula but a more explanative version
Hello, stones44!
So there is wall.
The top has 1 brick, then the next row has 3 bricks, then 5 bricks, etc.
There are 2500 bricks in the wall.
How many rows are there?
Without a formula? . . . Then a child can do it!
Just start adding: . . until you reach 2500.
Then count up the number of numbers you added.
. . . I'll wait in the car . . .
Formula for the sum of the first terms of an arithmetic series:
. .
We have: .first term, . . . common difference,
We know: . . . . and we want .
So we have: .
Therefore: . . . . There are 50 rows.