7,7,7,7,7 & +,-,x,/ using these numbers & symbols prove that
the total sum is 100
2006-12-22 06:53:12 · 4 answers · asked by pipo pa 1 in Science & Mathematics ➔ Mathematics
no ,you can use some of them, no limit
2006-12-22 07:13:13 · update #1
(777 - 77)/7 = 100 six seven #
(7/.7) x (7/.7) = 100 four seven and use 0 (0.7) #
2006-12-22 07:23:52 · update #2
please just use 5 seven(7,7,7,7,7) and symbols to make 100
2006-12-22 08:26:07 · update #3
I'm still struggling to find an answer with only five 7s and no other digits... here are my closest attempts:
(777 - 77)/7 = 100
(7/.7) x (7/.7) = 100
(7 1/7+7 1/7)*7 = 100
(7+(7^0)/7) * (7+7) = 100
((((7 !) + 7) / 7) - 7 - 7 - 7) / 7 = 100
2006-12-22 07:13:20 · answer #1 · answered by Puzzling 7 · 1⤊ 2⤋
It seems to me we can only use 5 "7"s. Otherwise, this problem can have infinite number of solutions.
For example,
(77/7 - 7/7)(77/7 - 7/7) = 100
(777/7 - 77/7) = 100
(7 + 1/7)(7 + 7) = 100
....
2006-12-22 16:12:11 · answer #2 · answered by sahsjing 7 · 0⤊ 0⤋
17x4+
2006-12-22 15:27:00 · answer #3 · answered by Anonymous · 0⤊ 1⤋
Do we have to use all the signs? (+-/x)
2006-12-22 15:05:30 · answer #4 · answered by Sergio__ 7 · 0⤊ 0⤋