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1.1 Find next number in the sequence (1. 3, 6, 18, 72, ___)
1.2 Find wrong number in the sequence (1. 3, 6, ?, 72, 360)
1.3 Find missing number in the sequence (1. 3, 6, 17, 72, 360)
1.4 Alphabet series (1. BDF,CFI,DHL,? 2. A,E,I,O,?)
1.5 Missing Letter Series (1. ??aba??ba?ab 2. ab???b?bbaa?)





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