Puzzles - Missing letters puzzles

Answer

:

P

Explanation

:

Start at the top of the left hand triangle and move in horizontal lines, from left to right, across all the triangles at once, top to bottom. Letters are written in sequence, skipping 2 letters, then 3, then 4, before repeating this sequence.

Answer

:

N

Explanation

:

Working in columns from top to bottom, left to right, letters are written in alpha- betic sequence, in steps of 3 letters, then 4, then 5 etc.

Answer

:

I

Explanation

:

Starting with the letters in the top left square, and moving around the other squares in a clockwise spiral towards the centre, letters advance through the alphabet in steps of 4 letters at a time, with the relative positions of each letter moving 1/4 turn clockwise at each step.