Missing letters puzzles - Section 1
Practice and master this topic with our carefully crafted questions.
Starting on the top left of each outer square, and moving clockwise around the corners of the squares, letters advance through the alphabet in steps of 4 for the upper left square, 5 for the upper right, 6 for the lower right .
Starting in the top left of the diagram, and working in columns, from top to bottom, letters follow the alphabetical sequence, advancing 2 letters, then 4, then 6, then 8 etc.
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.
Starting with A and C, as you move clockwise, the numerical value of the next letter equals the sum of the preceding two letters.
In each diagram, add the numerical value of the upper right and left letters to the lower right and left letters, to give the letters in the centre of the columns. Calculate the difference between these middle letters to give the value of the letter right at the centre.
Add 6 to the numerical value of each of the larger letters, and write the letter with this value in the smaller square diagonally opposite.
In each group of 3 boxes, calculate the difference in numerical values between the top two letters, and add 1 to give the value of the letter in the lower box.
Converting all letters to their numerical values, the middle section of each row of the diagram contains a list of letters which are common multiples of a number, given by the value of the letter in the right hand box. One letter in each row does not follow this sequence, and is put in the left hand box.
Starting with the bottom row and moving up, one row at a time, the sum of the numerical values of the letters starts at 26 for the bottom row, then 24, 22 and 20 as you move up.
Working from top to bottom, replace each letter with its numerical value and read each pair of numbers as a 2 digit number. Numbers follow the sequence of multiples of 9, from 27 to 72.