Question : Directions: In the following question, select the missing number from the given series.
729, 512, 343, 216, ?
Option 1: 36
Option 2: 64
Option 3: 25
Option 4: 125
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Correct Answer: 125
Solution :
Given:
729, 512, 343, 216, ?
The numbers given in the series are the cubes of the natural numbers in descending order.
729 ⇒ ∛729 = 9
512 ⇒ ∛512 = 8
343 ⇒ ∛343 = 7
216 ⇒ ∛216 = 6
So, the next term of the series is 5³ = 125
Hence, the fourth option is correct.
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