How to store data securely to compliance with GDPR

I have successfully implemented  a GDPR compliance for my client recently and my main objective was how do I store data securely to compliance with GDPR. This was a new experience for me and I wanted to help as many as possible.

Clock is broken. Reveal answer.

Yesterday I asked a puzzle about broken clock. Today I am giving the answer and How did I solve it. My first and clear approach was identified a total sum of 1 to 10 which is 55. But if we need to