Question

Giovanni was playing with blocks and started with one blue triangular block and kept adding more

Answer 1

Blocks would he need on the 12th step of the pattern is 34.

The correct option is A

What is series?

A series is the cumulative sum of a given sequence of terms.

Given:

We can write the series as follows:

1,4,7,10,13,.......

First term =1

common difference= 4-1=3

Using Arithmetic series

$a_{12}$= a+11d

    =  1 +11*3

    = 1+33

    = 34.

Hence, 34 blocks need on 12th step.

Learn more about arithmetic series here:

brainly.com/question/2171130

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