Puzzles #11 and #12: Lunar years and Hole of the moon

#11 Lunar years

My twin sister went to live on the moon on our 30th birthday. From then on, she counted a year as 365 sunrises, just as we do on Earth. I am now 60. Which birthday did she last celebrate?

#11 Hole of the moon

I punched a hole 6 millimetres across in a piece of paper and held it at arm’s length to look at the full moon. I was pleased to find that the moon filled the hole perfectly. If the moon is 3500 kilometres across, can you estimate how far away it is?

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