Puzzles - Missing letters puzzles

Answer

:

1:Q 2:D

Explanation

:

The first oval contains letters with even numerical values, and the second oval contains letters with odd numerical values.

Answer

:

B

Explanation

:

In each square, the sum of the numerical values of the top and bottom letters equals the sum of the left and right hand letters.

Answer

:

F

Explanation

:

Add together the numerical values of the letters which appear in the outer segments, and put the letter with this value in the inner segment, one place clockwise.