8 24 12 ? 18 54
5 10 30 150 950 11550
...5 4 29 24 185 ?
5 10 40 80 320 640
4 a b c d e
Find the value of d.
...Complete the series choosing the missing number.
8, 13, 20, ____, 40.
5 11 32 65 ? 389
...7 29 ? 129 211 349
2401 2402 1203 ? 105 26
...48 24 72 18 90 ?
? 190 210 238 274 318
...
