Puzzles - Missing letters puzzles

Exercise : Missing letters puzzles
115.
Answer
:
F
Explanation
:
Working in rows, from top to bottom, the sum of the numerical values of the letters in each row starts at 12, and increases by 2 as you go down each row.

116.
Answer
:
G
Explanation
:
The numerical values of the letters in opposite segments of the circle add up to 16 each time.

117.
Answer
:
H
Explanation
:
Working from top to bottom, letters are written in pairs. Take the 2 digit numerical value of the first letter and add the 2 digits together. Write the letter with this numerical value in the next space down. Continue in this way down the line.