If you know, for example, that Lauren wasn't born in 1961, you can add an X in the box where the Lauren column and 1961 row meet. You can eliminate pairs you know aren't true with an X, and pencil in pairs you know are related with an O. The grid allows you to cross-reference every possible option in every category. educated guesses are not required).Ī custom-labeled grid is provided for every puzzle, like the one you see to the right. Each puzzle has only one unique solution, and each can be solved using simple logical processes (i.e.
Logic puzzles with grids series#
Your goal is to figure out which options are linked together based on a series of given clues. In each puzzle you are given a series of categories, and an equal number of options within each category.
Logic puzzles come in all shapes and sizes, but the kind of puzzles we offer here are most commonly referred to as "logic grid" puzzles.
Logic puzzles with grids free#
Feel free to solve online just for fun, or, for an added challenge, register a free account and compete against thousands of other solvers to make it into our Logic Puzzle Hall of Fame! It doesn't matter which you cross off.Welcome to the world's largest web site devoted to logic puzzles! We've got more than 25,000 unique puzzles available for play, both online and the old fashioned way - with pencil and paper. Cross off one of these duplicate sections so you only have one to pay attention to. For instance, the section that compares "Anna, Brad, Caroline" on the left and "red, blue yellow" on the top is the same as the section that compares "red, blue, yellow" on the left and "Anna, Brad, Caroline" on the top.
You'll never need to compare the list "Anna, Brad, Caroline" to the list "Anna, Brad, Caroline" – you already know that Anna is Anna. If the list to the left of a section and the list above a section are the same, cross it out.Be careful not to cross the thick lines into another section. Follow these instructions to cross off sections you don't need, either using a large X or by scribbling over it. Each section is a comparison of one list on the left and one list on the top. The thick lines between lists should divide your grid into several sections (nine in our example). Some tricky puzzles will give you hints about what someone doesn't have, such as "Brad didn't make a dessert." In this case, you should add "none" to the list of desserts, which should make it the same length as the other lists.Ĭross out sections of the grid you don't need.If a list is too short, reread the puzzle carefully for more items. Each list should have the same number of items once you've finished.When the puzzle mentions a color, add it to a separate list of colors. When the puzzle mentions a name, add it to a list of names. For instance, "each person brought a different dessert" tells you that you need a list of people and a list of desserts. Keep an eye out for the word "each": that often tells you which categories are important. Often, you'll have to read the puzzle carefully and make several lists yourself. Sometimes, the puzzle will already give you a list of names, colors, or whatever other basic information makes up the puzzle. Read the puzzle carefully and make a list of basic information. Skip to Solving Other Logic Puzzles if your puzzle does not fit this description. Note: skip to Using a Grid if the puzzle already comes with a grid set up.There's actually a third category, shirt color, which should help you get to your answer.
Logic puzzles with grids how to#
Using the clues in the description, you need to figure out how to match each person to a dessert until you know who brought the ice cream. You start out knowing the names of several people and the names of several desserts, but you don't know who brought which dessert. The example question, like all logic puzzles of this type, asks you to match two categories together.Brad didn't bring any dessert at all, which made the person wearing a yellow shirt irritated. The person who brought brownies couldn't find her red shirt today. Each friend is wearing a different color shirt. Here's an example problem: Three friends named Anna, Brad, and Caroline agree to bring one dessert each to a birthday party.Many books and websites that contain collections of logic puzzles use this type of puzzle. The question usually has to do with matching two categories together, or listing the order a group is placed in. Typically, these have a description or a list of facts that describes a group of people, or houses, or other objects. Use this method for logic problems that ask you to match multiple categories together.
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