This was the famous maths puzzle that took about 358 years to be solved. In 1637, the mathematician Pierre de Fermat wrote a statement in the margin of his book. The statement was that the equation aⁿ + bⁿ = cⁿ has no solutions in whole positive numbers when the value of n > 2. Fermat also claimed that he had a proof, but the margin was too small to write it. However, he never revealed this proof during his lifetime. Because of this, the statement became a major puzzle for mathematicians. For more than three centuries, many of the greatest mathematicians tried to prove it, but no one succeeded. Then, in 1994, the British mathematician Andrew Wiles, after working on it for about 10 years, finally proved the theorem.