Complete the series: 2, 6, 12, 20....?
Complete the series: 2, 8, 18, 32, 50,........?
Complete the series: 20, 24, 33, 49, 74, 110 ?
Complete the series: 224,195,168,_,120
Complete the series: 231, 342, 453, 564, .....?.....
Complete the series: 274, 301, 426, 769, 1498, 2824, 5026, ?
Complete the series: 3, 10, 29, 66, .....?
Complete the series: 3, 7, 16, 35,.........
Complete the series: 30, 110, 240, 420,.........?
Complete the series: 3F, 6G, 11I, 18L, ?