I've turned comments off on this blog as I'm getting quite a lot of spam. I've been able to keep on posting on flickr but haven't the time and energy to manage to be an active blogger. Sorry not to have been visiting your blogs.
My best wishes to you all!
Update: Comments are back on and I'm back!
BrainTwister #119: No two 2s
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From New Scientist #3588, 28th March 2026 [link] [link] There are some
numbers whose digits are all 1s or 2s and that don’t contain two 2s in a
row: for ex...

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