Question

A house contains 46 bricks along its bottom row. If each row above decreases by 4 bricks, how many bricks are on the 12th row?

Answer 1

A1 = 46
A2 = 46 - 4(1)
A3 = 46 - 4(2)

An = 46 - 4(n-1) perhaps?

Answer 2

A12 = 46 - 4(11) = 2

Answer 3

Thank you! This is the same answer I got - just double checking which forula to use - so I must be correct :). Thanks again!

Answer 4

youre welcome; i got no idea what formula to use, just tried a little of me uncommon sense ;)

Answer 5

I think it is arithmetic series formula. I'll double check. Bye and thanks!