Do U Sudoku?

My mama loves to play word puzzle and sudoku. I used to help her collect them from daily newspaper. I love doing word puzzle, too. I even bought myself a book that contains word puzzle on every pages. I was not interested with the sudoku because I didn't understand how they play it and I didn't bother to find out how, too.
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Yesterday, my husband was holding a newspaper and pen, headed to the bathroom (--?--). After several minutes, he came out with a big smile. I asked him why. He told me that he was happy that he had solved the sudoku in no time at all.
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That sparks an interest in me. I asked him how to play it and I did tried it. We printed out sudoku sheets from online. On my first sheet, I wasn't doing good. My husband explained to me the secret in solving it faster, I tried his way and he was right, I did solved my second sheet in no time at all.
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During our free time, we sat together in the living room and solve each other's sudoku sheet. It is fun and I really enjoyed it.