Answer of previous Puzzle 1:
E
Starting with Y, letter values decrease by 2, 3, 4, 5 and 6.
Answer of previous Puzzle 2:
1
The grid displays rotational symmetry of 180° around a central point.
Answer of previous Puzzle 3:
39
Going clockwise, each number is doubled then subtract 1, then 2, then 3 etc.
Answer of previous Puzzle 4:
6
Starting with each letter on the left, add 2 to give the number in the next two boxes, for the next groups add 3 and 4.
Answer of previous Puzzle 5:
9
For each group, add first and second figures on the top row to get the final figure, and the difference between the first and second numbers for the bottom right box.
Answer of previous Puzzle 6:
Z
Working in diagonal lines from top left to bottom right, letters move forward by 4 places.
Answer of previous Puzzle 7:
1
Numbers in the segments on the right hand half of the circle equal double the value of the numbers in the opposite segments, minus 3.
Answer of previous Puzzle 8:
6
In each diagram the reverse numerical value of each letter is written in the box below plus 5 for the first diagram, 4 for the second and 3 for the third.
Answer of previous Puzzle 9:
430
Multiply the hour value and minute value to give 36.
Answer of previous Puzzle 10:
14
In each square the centre figure equals the difference between the sum of the left and right segments and the sum of the top and bottom segments.
Answer of previous Puzzle 11:
B
Working from left to right the square moves 2 segments anti-clockwise, the circle 3 segments anticlockwise, the star by 4 segments anticlockwise and the triangle 1 segment clockwise.
Answer of previous Puzzle 12:
From top to bottom, Black Jack, Red King, Red Four and Black Eight.
In the first five rows the sum of the red cards equal the value of the right hand card. In the first 5 columns the sum of the black cards equals the value of the bottom card.
Answer of previous Puzzle 13:
-142 -3=139
Answer of previous Puzzle 14:
L
Going clockwise in each square, letters increase in value by the same amount.
Answer of previous Puzzle 15:
A
The figures are groups of three of the same number squashed and rotated 90°.
Answer of previous Puzzle 16:
2
Moving from left to right each box contains a decreasing square number, minus the root. (7 x 7 = 49 - 7 = 42 etc.)
Answer of previous Puzzle 17:
16
Starting with the top value and moving clockwise, numbers move around a 24-hour clock, advancing 5 hours for the left star, 6 for the middle and 7 for the right.
Answer of previous Puzzle 18:
From left to right
Working in columns add the number of black segments in the first two circles to give the bottom circle. The third circle down is the difference between the first two circles.
Answer of previous Puzzle 19:
Answer of previous Puzzle 19:
1
The product of the first row gives the first number in the second row. The sum of the numbers in the top row gives the second number. Repeat this for rows three and four.