
76. 

Answer: W
Explanation:
Starting at 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 by 5 steps, then back 2, repeating this pattern for the rest of the diagram.

77. 

Answer: S
Explanation:
Taking pairs of letters in the inner and outer segments of each eighth of the diagram, the numerical values always add up to 20.

78. 

Answer: K
Explanation:
Working in columns, add together the numerical values of the first and second letters, and put the letter with the reverse alphabetical value of this sum in the bottom space.

79. 

Answer: S
Explanation:
Starting with the G, move clockwise around the circle, in steps of 3 letters, then 4, 5, 6 and 7.

80. 

Answer: C
Explanation:
Converting each letter to its numerical value, and reading pairs of circles as 2 digit numbers, arranged in two vertical columns, numbers follow the sequence of multiples of 7, starting with 14 and ending with 63.


