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1, 6, 15, ?, 45, 66A. 25B. 24C. 28D. 23 |
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Answer» Correct Answer - C `1+5=6` `6+9(5+4)=15` `15+13(9+4)=28` `28+17(9+4)=45` `45+21(17+4)=66` |
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