A brick staircase has a total of 20 steps The bottom step requires 100 bricks. Each successive step requires 3 fewer bricks than the prior one. How many bricks are required to build the staircase?

A) 2570 bricks

B) 1400 bricks

C) 2860 bricks

D) 1430 bricks

Question

Mathematics

Amanda Bowen

15 April, 01:06

A brick staircase has a total of 20 steps The bottom step requires 100 bricks. Each successive step requires 3 fewer bricks than the prior one. How many bricks are required to build the staircase?

A) 2570 bricks

B) 1400 bricks

C) 2860 bricks

D) 1430 bricks

+4

Answers (1)

Know the Answer?

Jesse Anthony · Answer 1

1430

Step-by-step explanation:

just write on a piece of paper 1 through 20 and then right 100 and then keep subtracting 3 each number you give a number to. then add them all up

A brick staircase has a total of 20 steps The bottom step requires 100 bricks. Each successive step requires 3 fewer bricks than the prior one. How many bricks are required to build the staircase?A) 2570 bricksB) 1400 bricksC) 2860 bricksD) 1430 bricks

A brick staircase has a total of 20 steps The bottom step requires 100 bricks. Each successive step requires 3 fewer bricks than the prior one. How many bricks are required to build the staircase?

A) 2570 bricks

B) 1400 bricks

C) 2860 bricks

D) 1430 bricks