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Option 1 : 5 – 25 – 225
The pattern followed is,
Option 1 → 51 – 52 – 53, 53 = 125 not 225
Option 2 → 61 – 62 – 63 → 6 – 36 – 216
Option 3 → 91 – 92 – 93 → 9 – 81 – 729
Option 4 → 31 – 32 – 33 → 3 – 9 – 27
All follow the same pattern, except ‘5 – 25 – 225’
Hence, “5 – 25 – 225” is the different set.
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