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ǰλãҳ >> 7+7+7+7=24Ϊʲô? >>

7+7+7+7=24Ϊʲô?

ĸ7ӵ2824⣬7֧Ǧʣ7֧ǦʣĽ7֧ǦʣĸҲ7֧Ǧʣôֵܽüһ28֧Ǧˡ

⣺ 7+7+7+7 =7x1+1+1+1 =7x4 =2824

[(ln7+ln7+ln7)ln7] =(2+1+1) =4 =4321 =24

[(ln7+ln7+ln7)ln7]! =(2+1+1)! =4! =4*3*2*1 =24

7' = 0 7' = 0 7' = 0 1' = 0 0! = 1 ׳ 0! = 1 ׳ 0! = 1 ׳ 0! = 1 ׳ 1 + 1 + 1 + 1 = 4 4! = 24 ׳ ۺǣ[(7')! + (7')! +(7')! +(1')!]! = 24

2 7 7 11ô24㣺 2x77+11 =2x1+11 =2x12 =24

7+7+7+7+7+77 =21+217 =21+3 =24

4+7=11 20+11=31

£ (7777)7(7+7)24

7771024, 1㣺 ûд 2㣺 (7'+10'+10'+10')!=4!=4*3*2*1=24 (10mod7 +10/10)!=4! ȻĵΪ1 ׳ˣ0!=1!=1 ࣺΪmod,õ ,ҵIJϾ

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