• B + E = A
  • A + C = D
  • A + E = F

Solve

  • A + F = E
  • B + C = F
  • C + D = E
  • C + F = D

Solve

  • B + E = F + 3
  • D + E = A + 5
  • D + F = E + 2

Solve

  • B + C = A + 6
  • A + F = D + 5
  • C + E = F + 2

Solve

  • E = C + 3
  • F = E + 1
  • D = B + 1
  • B = A + 2

Solve

  • E = A + 4
  • C = A + 1
  • F = E + 1
  • D = C + 1

Solve

  • B = 4D
  • A = 3C
  • 3D = F

Solve

  • 2C = D
  • 2A = 3B
  • A = 2E

Solve

  • 3E = C
  • 3F = 4A
  • 2E = 4D

Solve

  • 4A = 3D
  • 4B = 2D
  • D = 4C
  • E > F

Solve

  • D + E = C + F
  • B ≠ 2
  • D ≠ 6
  • B ≠ 1
  • B + C = A + F
  • D ≠ 4
  • B ≠ 5

Solve

  • C + E = A + F
  • A + C = B + D
  • D ≠ 6
  • B ≠ 1
  • D ≠ 1
  • A + E = B + F

Solve

  • 2C = B + E
  • B > F
  • 2A = B + D
  • E > A

Solve

  • 2E = B + F
  • 2F = C + E
  • 2C = A + E
  • F > A

Solve

  • A + E ≤ 3
  • C + D ≤ 8
  • B + C ≤ 8
  • C + E = D
  • D + E ≤ 5

Solve

  • D + F = C
  • B + D = A
  • C + F = B
  • E > B

Solve

  • E + F = 7
  • A + B = 9
  • B + E = 11
  • C + E + F = 8

Solve

  • A + D = 8
  • B + D = 10
  • B + D + E = 15
  • D + E + F = 14

Solve

  • if D ≠ 5 then E < 1
  • if D + F ≤ 9 then A + C ≤ 8
  • if E + F ≤ 4 then A ≠ 2
  • if D ≠ 6 then F ≤ 2
  • if B ≥ 5 then C + D ≤ 5
  • if F ≤ 4 then A ≤ 5
  • if D > 3 then A ≥ 4
  • if A + B ≤ 11 then C + E ≤ 8
  • if F ≠ 2 then B + E ≤ 6

Solve

  • if B ≠ 2 then C + F ≤ 8
  • if A ≠ 6 then D ≤ 4
  • if B + E ≤ 3 then A + F ≤ 6
  • if C + F ≤ 7 then B ≤ 1
  • if B + C ≤ 10 then D < 2
  • if F ≠ 1 then B ≥ 5
  • if E ≠ 3 then C + F ≤ 4
  • if C ≤ 6 then A < 2

Solve

  • A ≤ 1 if and only if B ≠ 5
  • C ≥ 4 if and only if A + B ≤ 10
  • B < 1 if and only if E + F ≤ 4
  • A + D ≤ 11 if and only if F < 5
  • E ≤ 3 if and only if B + F ≤ 8
  • B > 4 if and only if A + F ≤ 11
  • E ≠ 4 if and only if B < 2

Solve

  • A + E ≤ 10 if and only if B > 4
  • E + F ≤ 5 if and only if B + D ≤ 3
  • B + D ≤ 9 if and only if A + E ≤ 5
  • C + F ≤ 3 if and only if B + D ≤ 7
  • A + D ≤ 7 if and only if F ≥ 2
  • D > 2 if and only if A + C ≤ 9
  • F < 1 if and only if C + E ≤ 6
  • D ≠ 3 if and only if A < 4
  • B ≤ 1 if and only if C ≠ 2

Solve

  • C = DF
  • A = AE
  • F = D + E
  • D + F = A

Solve

  • A = 2B + E
  • BE + F = C
  • C = B + F

Solve

  • CE + F = A
  • DE = A

Solve

  • A + B + 4E = CD + F
  • B = AC

Solve

  • E = AD
  • 8B + D + 1 = A + 2F
  • C > F

Solve

  • CD = B
  • A + D = 6
  • D + 4 = C if and only if A > F

Solve

More games

Zebra Puzzles
Zebra Puzzles

Use logic deductions to solve problems that are similar to the Einstein's Riddle.

Sudoku
Sudoku

Play the classic japanese logic game.

Greek Logic
Greek Logic

Fill the grid using the Greek letters.

Self-Referential Quiz
Self-Referential Quiz

Quizzes where you only need logic to solve them.