## Brain Teaser Math Tricks – 3 Second Multiplication Tricks To Solve Any Multiplication Problem?

Brain teasers are an exciting puzzle that needs thinking to solve. Brain teasers make you think out of the box and exploit your mind’s potential. One of the most recent brain teasers on social media and boggling many minds is Brain Teaser Math Tricks – 3 Second Multiplication Tricks To Solve Any Multiplication Problem

Let us first have a look at what this puzzle is.

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## Brain Teaser Math Tricks – 3 Second Multiplication Tricks To Solve Any Multiplication Problem- Solution

If you are still trying to get the answer to this, we have the answer to this puzzle. This brain teaser is a great way to test your observation skills and how sharp you are. If you still haven’t gotten the answer, the picture given below will make you understand this solution better.

Let’s take 12×32 as our example. Remember that numbers are represented using place value: 12 means one ten and two ones, 32 means three tens and two ones.

We then draw diagonal lines corresponding to the tens and, after leaving a gap, we draw more lines in parallel to represent the ones. So for the number 12 we get

All we’re doing is taking the familiar place value representation of numbers and making it visual. Now let’s do the number 32, except this time we’ll go in the opposite direction. You should be left with a rough diamond shape, with the lines crossing at the corners:

To calculate the product, we just need to count how many times all of the lines intersect and write each number under the diamond.

Begin by grouping the intersections vertically. That is, draw a loop around the group of intersections that is closest to the left side. Then begin moving right. Draw a loop around the center intersections. Finally, draw a loop around the intersections that are closest to the right side .

So the 12×32 is 3 hundred, 8 tens and 4 ones – in other words (or symbols, rather!) it is 384.

The method works because the number of parallel lines is like decimal placeholders and the number of dots at each intersection is a product of the number of lines. You are then summing up all the products with coefficients of the same power of 10. Thus in the example 23 x 12 = (2×10 + 3)(1×10 + 2) = 2x1x102 + [2x2x10 + 3x1x10] + 3×2 = 276.

The diagrams display this multiplication visually. The method can be generalized to products of 3-digit numbers (or even more) using more sets of parallel lines. It can also be generalized to products of 3-numbers using cubes of lines rather than squares.

Image source: Fresherslive

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