Well, here’s a chapter! I was watching Countdown episodes, and well, here’s puzzle: Make the number 952 from the following numbers: 25, 50, 75, 100, 6, 3. You cannot use a number more than once (you don’t have to use it though), and they can only be combined using the 4 basic arithmetic operations.

Kuma 216

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That is a Countdown classic! It’s not as complicated as it first seems, because it’s really just (effectively) using the 25 twice, because you need a three AND a two.

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I think I got a different solution.

[spoiler]

(25-6+3/75)*50 = 952

[/spoiler]

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Shouldn’t it be instead of [ ]?

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The math is also wrong btw

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All i could think of was

((100+6)*3*75-50)/25

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I got (100 + 3)* 6 * 75 / 50 + 25

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Wait… Can you even use parentheses???

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Yeah.

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Btw, I made some code to go through all the permutations without parentheses, none work

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Lol. Nice effort. I figured a code that uses parens would be brute forcing a tree? :thinking:

I’ve been considering making myself a random app (maybe using JS???) to help me generate the random numbers Countdown uses. Nice math training.

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It isn’t necessarily that difficult, I used python, to get parentheses working you would just take out part of my code.

I wrote the expression in a string then evaluated it so I didn’t have to use recursion for PEMDAS, but if you take that out and just sequentially do every operation, you’d basically have parentheses, not the whole arrangements, but some at least.

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rotate the 6 180%, then swap the 2 and 5 from 25 around. = 952

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