Insert +, -, x or / in suitable places on the left side of = so as to make the equation true:
999999999999999 = 1990
A book has N pages, numbered the usual way, from 1 to N. The total number of digits in the page numbers is 1,095. How many pages does the book have?
There are 5 ships in a port
A challenging brain teaser requiring you to pay close attention to details.
What is the minimum number of weighings required to identify the coin, and why?
Weekly brain teaser. Do you remember Algebra?
Can you figure out a way for four people to cross a rickety bridge in exactly (or under) 17 minutes?
You must be logged in to post a comment.
This site uses Akismet to reduce spam. Learn how your comment data is processed.
(9999-999)/9+999-9+9-9
(9999/9999)+999+999-9
999+999-9+(9999/9999)
YES.
999+999-9+(9/9)+999-999=1990
(9999/9)-(999/9)+(999-9)+(9-9)
Brackets don’t matter