Missing letters puzzles - Section 1

Start on the upper left of each diagram, and move to the right, then down the last 2 boxes in the centre. Letters are written in alphabetical order, in steps of 5 for the left hand diagram, 6 for the next, then 7, then 8.

Moving down the first column, up the second, down the third etc. letters increase by 7 in each alternate circles.

Start with the top left circle, and move in horizontal lines from left to right, top to bottom, across all 4 shapes. Letters are written in alphabetical order, in steps of 5 letters at a time.

Treat each star as 2 intersecting triangles, and start on the top or the left of each triangle in each star and move clockwise around it. Letters are written in alphabetical order in steps of 6 for the left hand star, 7 for the central one and 8 for the right hand star.

Each hexagon is filled with the letter of the alphabet you find one place after the vowels.

Starting on the left and moving right, letters are written in alphabetical order, using every other letter written with only straight lines.

Starting with the top letter in each star, and moving clockwise around the others, letters advance through the alphabet in steps of 8 for the left hand star, 9 for the central star, and 10 for the right hand star.

Starting with the A in the top left segment of the circle, and moving clockwise, letters follow a modified alphabetic sequence. To make the sequence, write the alphabet, removing all letters written with any curved lines, then take alternate letters from this sequence.

Start with the D on the outer left of the diagram, and move clockwise around the outer segments, then start on the N anti-clockwise around the inner segments. Letters advance through the alphabet in steps of 3, then 4, 5, and 6, repeating this sequence.

Starting on the top left, and moving to the right, then down one row and to the left etc. in a snakes and ladders pattern, letters advance through the alphabet in steps of 5, then 2, then 5 etc.