Answer: Option A Explanation:In each diamond, add the left and right hand numbers together, and subtract this sum from
the top number to give the value at the bottom.
Answer: Option D Explanation:In each row of the diagram, the central value equals the sum of the differences between
the left hand pair of numbers and the right hand pair of numbers.
Answer: Option D Explanation:The inner digit in each segment equals the sum of the two numbers in the outer
part of the opposite segment.
Answer: Option A Explanation:In each row of each grid, multiply the left and right hand numbers together to give a digit value,
and write this value in the two centre boxes.
Answer: Option B Explanation:In each H shape, the central number is equal to the difference between the sum of
the 3 left hand numbers and the sum of the 3 right hand numbers.