Jump to content
BrainDen.com - Brain Teasers

Recommended Posts

  • Replies 52
  • Created
  • Last Reply

Top Posters In This Topic

  • 2 weeks later...
  • 1 month later...
  • 2 weeks later...
  • 4 weeks later...
  • 2 weeks later...
  • 1 month later...
  • 2 weeks later...
100 - Back to the Number Puzzles

Using four sevens (7) and a one (1) create the number 100. Except (Edit: In addition to) the five numerals you can use the usual mathematical operations +, -, x, :, root and brackets ().

100 - solution

100 = 177-77 = (7+7)x(7+(1:7))

I do not know other solutions.

The number 100 already exists. I can't create it.

Link to post
Share on other sites
The number 100 already exists. I can't create it.

thanks for your "valuable" input ... based on previous warnings (you obviously ignored them) and the basic rules (especially on nit-picking) - your account has been suspended

Link to post
Share on other sites
  • 3 weeks later...
  • 1 month later...
(7*(7+7)) = 98

+ root7 = 100.64...

- 1 = 99.64... = 100(3sf)

That doesn't work because you need exactly 100, not approximations. Good try though, I can't get one yet. lol :lol::lol:

Link to post
Share on other sites
  • 2 weeks later...
  • 1 month later...
100 - Back to the Number Puzzles

Using four sevens (7) and a one (1) create the number 100. Except (Edit: In addition to) the five numerals you can use the usual mathematical operations +, -, x, :, root and brackets ().

100 - solution

100 = 177-77 = (7+7)x(7+(1:7))

I do not know other solutions.

I found a third solution:

(77/.77)^1=100

Link to post
Share on other sites
  • 1 month later...
  • 3 weeks later...
  • 1 month later...
My answer is: (7²+1)((7+7)/7) = 100

(49+1)(14/2) = 100

50x2 = 100

I thought inverting the 7's was sheer genius

U cant use that opperation

called concentation???

but u cant combine numbers like that

Link to post
Share on other sites
Guest
This topic is now closed to further replies.
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...