SEQUENCE 12:31::?:81

Keep practicing — related questions

• SEQUENCE 84:48::?:16
• SEQUENCE 5:20::3:?
• 12,2,26,12,34,__________
• 1 12 23 -- 45 56
• 1,3,11,13,29,__
• 2,6,12,18,_
• 8,12,21,37,.........
• 1,3,7,13,21,_