The Card Puzzle #5 from the Genius Puzzle Series challenges you to solve the math riddle using card symbols and a Joker card.

- Let S = Spade, H = Heart, C = Club, D = Diamond, J = Joker.
- From the fourth line: H = 3C. (Heart equals three Clubs)
- Substitute H = 3C into the third line: S + 3C = 6 + C → S = 6 - 2C.
- Substitute H = 3C and S = 6 - 2C into the first line: (6 - 2C) + 3C + C = 4D → 6 + 2C = 4D → D = (6 + 2C)/4 = (3 + C)/2.
- Substitute S = 6 - 2C and H = 3C into the second line: (6 - 2C) + C = 12 - 3C → 6 - C = 12 - 3C → 2C = 6 → C = 3.
- Now solve for others:
- H = 3C = 9.
- S = 6 - 2C = 0.
- D = (3 + C)/2 = (3 + 3)/2 = 3.
- Finally, evaluate the last expression: S + C × H - D = 0 + 3 × 9 - 3 = 0 + 27 - 3 = 24.
- Therefore, Joker = 24.