Answer of previous Puzzle 1:
6
Take the 2 digit number at the centre of each segment putting the sum and the difference of the two digits in the segment opposite.
Answer of previous Puzzle 2:
37
As you go down, double the previous number and subtract 5.
Answer of previous Puzzle 3:
6
In each square, add up the outer three numbers, then add the two digits of the result together to give the central number.
Answer of previous Puzzle 4:
Answer of previous Puzzle 5:
6
Each row and column contains 4 consecutive numbers in a random order.
Answer of previous Puzzle 6:
F
Starting bottom right and moving in an anticlockwise spiral, letters skip 1 space, then 2 etc. etc. returning to the letter A whenever Z is reached.
Answer of previous Puzzle 7:
In rows, the right hand box contains only the features common to the two boxes to the left. The columns are calculated the same way, with the bottom box containing only the features common to the boxes above it.
Answer of previous Puzzle 8:
12
In each triangle, divide the product of the upper and left hand numbers by the right hand number to give the central number.
Answer of previous Puzzle 9:
3
Working in columns, subtract the middle number from the top number and multiply by 3 to give the bottom value.
Answer of previous Puzzle 10:
3
In each diagram, add up the 4 outer numbers to give a 2 digit value. Add these 2 digits together to give the central value.
Answer of previous Puzzle 11:
24
Square the numbers 1, 2, 3, 4 and 5 and subtract 1.
Answer of previous Puzzle 12:
D
The figures in the other three boxes total greater than 100.
Answer of previous Puzzle 13:
O
Moving from left to right, letters on corresponding points of each triangle increase in steps of 4, 5 and 6.
Answer of previous Puzzle 14:
B
In each square take the numerical value of the left and right segments to give the value of the letter in the top segment and the reverse alphabetical value of the letter in the bottom segment.
Answer of previous Puzzle 15:
8
For each number on the left, starting at the top, double it and subtract 1, then 2, 3, 4 etc. to give the right hand number.
Answer of previous Puzzle 16:
R
Starting on the left in rows, letters ascend in sequence at intervals of 5 for the top row, then 4, then 3.
Answer of previous Puzzle 17:
Jenny is 37, her father is 73.
Answer of previous Puzzle 18:
14
The numbers in the inner ring are the same as the numbers in the opposite outer ring, divided by 3.
Answer of previous Puzzle 19:
5
In rows, the sum of the left and centre value equals the right hand value for the first and third rows, in the second and fourth rows the right hand value equals the difference between the left hand and centre numbers.
Answer of previous Puzzle 20:
T
Add the reverse alphabetical values of the three letters around each triangle to give the middle letter in forwards alphabetical order.