Question
11, ? 220,  660, 1320,Â
 1320 Find the missing number (?) in the given number seriesSolution
11, ? 220,  660, 1320,  1320 11 × 5 = 55, 55 × 4 = 220, 220 × 3 = 660, 660 × 2 = 1320 1320 × 1=1320
4, 4, 12, 60, ?, 3780
18, 10, 12, 21, ?, 120
What will come in place of the question mark (?) in the following series?
10, 410, ?, 710, 760, 785
380, ?, 360, 324, 260, 160
What will come in place of the question mark (?) in the following series?
45, 66, 44, 67, 43, ?
1024, 256, 768, 192, 576, 144, ?
12, 13, 27, 82, 329, ?
8, 15, 44, 175, 874, ?
290, 571, 900, ?, 1485, 1890
18Â Â Â 19Â Â Â 34Â Â Â 111Â Â Â Â 428Â Â Â Â 2165Â Â Â Â ?
...