✅ Online maths puzzles for children or adults are riddles, in the form of symbolic equations, to solve. They are also called cryptoarithmetic, due to the fact that you have to decipher the numerical value of the objects using mathematical operations. The aim is to find out the value of each symbol, and solve the final riddle by determining the value of the unknowns. Solve these mathematical riddles, applying mathematical logic to equalities with symbols of different themes.