Math Brain Teaser Puzzle for Kids Adults Mind Game High Qifficulty Toy Description: Arrange each of the the five's puzzles wheels so that each column of all 16 columns equal 50. A great mid level difficulty puzzle for ages 12 and up. Help intellectual development, math puzzles. Suitable for a wide range of fields, whether it is adults or children You will never have to worry about the numbers wearing off this brain teaser as the are engraved. Specification: Material: Wood Size: approx. 13x13x2.5cm/5.12x5.12x0.98inch Package Includes: 1 Pc Wooden sliding puzzle Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.