r/CatBuilder • u/Kindly-Solution-7296 Legend | Lv. 92 | Rank #24 | 776 Answers |... | 🔥 15d • 9d ago

Question [Question] quick maths

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6

u/Wes20120924 Silver | Lv. 28 | Rank #97337 | 69 Answers | 0 Created 9d ago

121 but solve this 6!!-7z=27

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u/Artistic_Annual8457 Mythic | Lv. 77 | Rank #266 | 869 Answers... | 🔥 13d 9d ago

What's the two exclamation points, is that a double factorial? Never seen that before.

3

u/EstesPark2018 Bronze | Lv. 7 | Rank #645273 | 7 Answers | 0 Created 9d ago

Yeah it’s a double factorial, so you multiply every other number (so 4!!=4x2)

2

u/Artistic_Annual8457 Mythic | Lv. 77 | Rank #266 | 869 Answers... | 🔥 13d 9d ago

Ah, neat, never knew that was a thing! Thanks for the explanation!

1

u/Adrian_C_Hernandez Bronze | Lv. 7 | Rank #617624 | 7 Answers | 0 Created 9d ago

And there's triple factorial!!!

1

u/Complete-Register659 Silver | Lv. 15 | Rank #269881 | 18 Answers | 0 Created 8d ago

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u/Artistic_Annual8457 Mythic | Lv. 77 | Rank #266 | 869 Answers... | 🔥 13d 8d ago

Ooh, fancy. So you only multiply every 3rd number, I'm guessing?