In how many ways can letter of the word MAILINGS arrange so that M and N always come together? 

What should come at place of question mark (?) in the following number series?

1.7 5.4 19.2 80.8 409 ?

What should come at place of question mark (?) in the following number series?

15 20 50 165 680 ? 

What value will come in the place of question mark in the following number series?
5 9 36 208 1398 ? 

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

6 13 38 ? 532 2675 

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

3 22 ? 673 2696 8093 

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

17 52 158 477 ? 4310 

What will come in place of question mark(?) in the following number series?
11, 57, 149, 333, 701 (?)