Find the missing number in the pattern
5, 15, 45, ? 405

345

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405

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135

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300

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Solution

The correct option is C 135
The pattern follows the rule that the next number is 3 times its preceeding number
$5 \times 3$ = 15
$15 \times 3$ = 45
So, the missing number will be obtained by multiplying 3 to 45
$45 \times 3 = 135$
Hence 135 is the missing number.

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