Which of the following is the outer layer of the Earth

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

34, 61, 7, ?, -20, 115

Choose the missing term.

3F, 6G, 11I, 18L,?

120, 115, 120, 135, 160, ?

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

In each of the following number series, one term is missing. Find the missing term.

3, 5, 20, 24, 144, 150, ?

7 29 61 ? 211 349

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

2.5, 6.5, 18.5, 54.5, 162.5, 486.5, ?

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

60, 110, 224, 463, ?, 1716

4, 12, 36, 108, ?, 396

What value should come in the place of (?) in the following number series?

4913, 2197, ?, 343, 125, 27