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Question

24, 21, 18, 15 .......

What are the next two terms in the given sequence?

A
12, 9
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B
10, 9
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C
11, 8
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D
12, 7
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Solution

The correct option is A 12, 9
Let the next two terms in the sequence be x and y respectively.

24, 21, 18, 15, x , y ....

21 = 24 - 3
18 = 21 - 3
15 = 18 - 3

Observing the pattern we observe that each term is obtained by subtracting 3 from the previous term.
x = 15 - 3 = 12
y = 12 - 3 = 9

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