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In which of the following situations, do...

In which of the following situations, does the list of numbers involved is in the form of a GP?
(i) Salary of Sharmila, when her salary is 5,00,000 for the first year and expected to receive yearly increase of 10%.
Number of bricks needed to make each step, if the stair case has total 30 steps, provided that bottom step needs 100 bricks and each successive step needs 2 brick less than the previous step.
Perimeter of the each triangle, when the mid points of sides of an equilateral triangle whose side is 24 cm are joined to form another triangle, whose mid points in turn are joined to form still another triangle and the process continues indefinitely.

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The correct Answer is:
(i) NO, (ii) No, (iii) Yes
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