Question : Direction: 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.
1, 5, 25, 125, ?, ?, ?
Option 1: 245, 485, 965
Option 2: 225, 325, 425
Option 3: 625, 3225, 15605
Option 4: 625, 3125, 15625
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Correct Answer: 625, 3125, 15625
Solution :
Given:
1, 5, 25, 125, ?, ?, ?
Here, the pattern is that the given term is being multiplied by 5.
1 × 5 = 5; 5 × 5 = 25; 25 × 5 = 125; 125 × 5 = 625; 625 × 5 = 3125; 3125 × 5 = 15625
So, the series becomes → 1, 5, 25, 125, 625, 3125, 15625
Hence, the fourth option is correct.
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