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EastWind [94]
3 years ago
9

111

Mathematics
1 answer:
rodikova [14]3 years ago
5 0

Since 111, 777, and 999 are all bigger than 20, make them smaller. Take out one 1, two 7, and two 9  (5 numbers):  11 + 7 + 9 ≠ 20 (it equals 27). Now take out number 7.  (If you take out number 1 [1+7+9=17, not 20] and of you take out number 9 [11+7=18, not 20].

11 + 9 = 20  (you took out numbers: 1, 7, 7, 7, 9 and 9 [6 numbers]).

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