Privacy Policy

Terms & Conditions

See Details This website uses cookies. By using this website you are accepting the use of cookies. For more information please view the privacy policy.
Hint: It didn't matter how many library members or nonmembers there were.
Answer: 4,200 books.
It doesn't matter how many library members there were as 1/2 of them accepted the books, and each accepted 6 books, which is 3 books per member on average.
Similarly it doesn't matter how many nonmembers there were as 3/4 of them accepted the books, and each accepted 4 books, which is again 3 books per nonmember on average.
So both the members and nonmembers accepted, on average, 3 books each. And 1400 * 3 = 4200.
Puzzle 8
Here is a curious grid, the sums of the shapes are shown at the end the row and at the base of each column.
What is the missing sum? What are the different shapes worth?
BrainBashers™ is a trademark. This website uses cookies. By using this website you are accepting the use of cookies. For more information please view the privacy policy. By using this website you are also agreeing to the terms and conditions.