Q. 1 B

In which of the following situations, does the list of numbers involved in the form of a GP.?

Number of bricks needed to make each step, if the stair case has total 30 steps. Bottom step needs 100 bricks and each successive step needs 2 brick less than the previous step.

Answer :

This is not in GP

Since they have given common difference -2

They have said that successive steps need 2 bricks less than the previous.

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