# Missing Letter Puzzles 4 [With Answers]

Puzzle 1: Which letter replaces the question mark? 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.

Puzzle 2: Which letter replaces the question mark? Answer: G

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

Puzzle 3: Which letter replaces the question mark? 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.

Puzzle 4: Which letter replaces the question mark? Answer: N

Explanation: Moving from left to right, top to bottom letters follow alphabetical order, skipping any letters written with curved lines.

Puzzle 5: Which letter replaces the question mark? Answer: S

Explanation: Working from top to bottom, the numerical values of the letters follow the sequence of Prime Numbers, adding 1, then 2, then 3 etc.