Number Mania: Math Puzzlers for Smart Kids - Tapa blanda

If you've got a mind for math, these puzzles will multiply your number fun many times over! The five challenging levels each contain the same types of grids and shapes, so they'll become familiar to you. But, as you move from the easier ones to the more difficult, the methods needed to solve them will change. Start at Level One and work through each puzzle, taking your time and figuring out how to solve it. Some of the harder ones will even have little clues to help you. Before long, you'll have done every one.without peeking at the answers!

Here's one to sample, from the first group:

WEB WORLD
Which number replaces the question mark and completes the web?
(Hint: Try rotating part of the web.):

The answer is 5. The numbers in the inner ring have been moved one place clockwise from the numbers in the outer ring.

If you've got a knack for math, these puzzles will add up to a whole lot of fun. The five challenging tests each contain the same type of grids and shapes, so you'll soon become familiar with them. But they feature a range of puzzles--some are easy, while others require a bit more thought. Take your time figuring out how to solve them, feeling your confidence grow as you get the answers right. Some of the harder ones even have hints to help you. Before long, you'll solve the puzzles--without peeking at the answers in the back!

How will you do on this one:
Odd One Out
Which number is the odd one out in each oval?