Question : Directions: In the following question a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
720, 180, 176, 44, 40, 10, ?, ?
Option 1: 6, 2
Option 2: 4, 2
Option 3: 6, 4
Option 4: 8, 6
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Correct Answer: 6, 2
Solution :
Given:
720, 180, 176, 44, 40, 10, ?, ?
Divide and subtract 4 alternately from the previous term to obtain the missing term.
720 ÷ 4 = 180, 180 – 4 = 176, 176 ÷ 4 = 44, 44 – 4 = 40, 40 ÷ 4 = 10, 10 – 4 = 6, 6 ÷ 4 = 1.5 ≈ 2
So, 6, 2 is the missing term in the given series. Hence, the first option is correct.
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