Answer: Option A Explanation:In each row, the left hand number equals the total of the even valued letters in the middle box,
and the right hand number equals the total of the odd valued letters in the middle box.
Answer: Option B Explanation:The value at each corner of the diagram equals the difference between the sums of the numerical values of
the letters in the boxes adjacent to the corner.
Answer: Option C Explanation:In each diagram, the numerical value of the left hand letter equals the product of the upper and lower left hand numbers,
and the right hand letter equals the product of the upper and lower right hand numbers.
The numerical value of the central letter equals the sum of the numerical values of the left and right hand letters.
Answer: Option C Explanation:Starting on the left and working to the right, take pairs of dominoes and calculate the sum of the dots they are displaying.
This sum follows the sequence 3, 6, 9 and 12.
Answer: Option A Explanation:As you move from left to right, the spot total on each domino increases by 3 then decreases by 1 alternately.