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Keep practicing — related questions

• 1,12,25,40,_,76,97
• 2, 6, 12, 20, 30, 42, 56, _______
• 2,3,6,6,18,12,54,_
• 22,30,42,__,68
• 6 10 18 34...........
• 5 6 11 66 9 7 16............
• 6 36 7 49......... 64
• 1,9,25,49,..