Toothpick puzzles encourage logical thinking skills and geometry concepts too. Now ask kids if they can figure out how the trick works. Keep a running sum of those numbers, and announce your total at the end. If they say yes, note the number in the top left corner. As you show them each card one by one, you’ll ask them whether their number is on that card. Put the cards in a pile and ask a student to pick any number between 1 and 30, without telling you what it is.
#Number magic trick free
Print the free cards at the link and use them for this clever “magic” trick. Switch things up with a crossword made up of numbers and equations instead of letters! Have kids solve this one, then challenge them to make up one of their own. Try this one on your students, then see if they can create their own math pyramids! The correct answer here is 7-3, which equals 4. In this one, each number is found by subtracting the smaller from the larger of the two numbers underneath. In a number pyramid, numerals are arranged in patterns, and one or more squares are left empty to be filled in with the correct answer(s). Learn more: Calendar Math/Learn With Math Games 6. For instance, say you want to multiply 9 x 17. Simply multiply the number by 10, and subtract the original number. All you have to do multiply the center number by 9-you’ll get the right answer every time!īonus Trick: Multiplying numbers by 9 is easy. Tell them you can find the sum of those 9 numbers faster than they can add it up on a calculator. Pull out a calendar and ask students to put a square around a 3 x 3 box, enclosing 9 numbers. Find out how it works and get lots of free puzzles to try at the link. Each row and column must equal the numbers at the end. The challenge is to fill in the blank squares using the operation indicated in the bottom right corner. Yohaku math puzzles are a new spin on magic squares. Bottlecaps work perfectly for these math puzzles too! This can be a low-key way to ease kids into magic squares, since there aren’t as many lines to contend with. Magic Triangles are just like magic squares, but each side of the perimeter adds up to the same number. Find out how these math puzzles work and get free printables at the link. Now kids can slide them around until they get the right combination.
Tip: To make it easier for kids to work out the solution to magic squares, try writing numerals on bottle caps. For a 3×3 square, each line adds up to 15. Each line of the square (horizontal, vertical, and diagonal) must add up to the same sum, and each box must contain a different number. A magic square is made up of equal rows of numbers (3×3, 4×4, etc.). Magic squares are the basis for the ever-popular Sudoku math puzzles, and they’re fantastic learning tools for kids. Visit the link to learn a cool visual method to walk students through the steps. Tricks like this are lots of fun for getting kids to practice mental math, but they also provide a terrific opportunity for kids to use algebraic thinking to come up with their own puzzles.
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