Who has been appointed as the Prime Minister of Estonia

15, 120, 840, 5040, ?, 100800

What will come in place of the question mark (?) in the following series?

77, 198, 342, 511, 707, ?

What will come in place of the question mark (?) in the following series?

81, 83, 87, 95, 111, ?

1221,      1100,      1000,      919,        ?

Find the missing term in the series:

2, 7, 22, 67, 202, ?

[(145)² ÷ 25 × 52] ÷ ? = 29 × 13

74, 84, 64, 104, ?, 184

114, 156, ?,  238, 274, 304

124, 128, ?, 135, 110, 146

45, ?, 84, 114, 151, 195