| Answer | : | 4 |
| Explanation | : | Split the left and right hand circles into 2 halves vertically. The numerical value of the letter in the upper left segment of the central circle equals the sum of the numbers in the left half of the left hand circle, and the letter in the lower left equals the sum of the numbers in the right half of the left hand circle. Repeat this pattern for the right hand circle.. |
| Answer | : | G |
| Explanation | : | Convert each letter to its numerical value, and read each pair of values as 2 digit numbers. In each row, the number in the center equals the difference between the 2 digit values on the left and right. |
| Answer | : | B |
| Explanation | : | In each row of the diagram, the reverse alphabetical value of the central letter equals the sum of the left and right hand digits.. |
| Answer | : | 3 |
| 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. |
