# A stack of bricks has 61 bricks in the bottom layer, 58 bricks in the second layer, 55 bricks in the third layer,and so on until there are 10 bricks in the last layer. How many bricks are there all together?

##### 2 Answers

Jul 2, 2018

#### Explanation:

The order of bricks is

This is an arithmetic series with first term

As

and therefore

and as sum of the series

Number of bricks is

Jul 2, 2018

#### Explanation:

Number of terms

Hence, the total number of bricks in the stack