In following question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces.
165, 195, 255, 285, 345,
A
375
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B
420
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C
435
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D
390
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Solution
The correct option is B 435 Each number is 15 multiplied by a prime number i.e. 15 * 11, 15 * 13, 15 * 17, 15 * 19, 15 * 23. ∴ Missing number = 15 * 29 = 435.