I hope you enjoyed Saturday’s Mac Riddles, episode 361. Here are my solutions to them.
1: This second was actually the sixth and bumped up by 20.
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Macintosh II
This second (II) was actually the sixth (there had been five previous Mac models) and bumped up by 20 (its CPU was the first 68020 used in a Mac).
2: Its A5 followed the A4, without any one, and a third thinner.
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iPad 2
Its A5 (its chip) followed the A4 (the chip in the original iPad), without any one (there was no iPad 1), and a third thinner (it was claimed to be about 33% thinner than the original iPad).
3: First with a 750 followed the 604, but there was neither 1 nor 2.
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Power Macintosh G3
First with a 750 (it was one of the first Macs with a PowerPC 750 processor) followed the 604 (previous models had PowerPC 601-604 processors), but there was neither 1 nor 2 (Apple didn’t start naming Power Macs by generation until the G3).
The common factor
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They were each the first model in their series to be numbered, but didn’t start at 1.
I look forward to your putting alternative cases.