Make any number from four fours

When you first start out, the problem seems pretty simple. So, for example, 4 – 4 + 4 – 4 = 0. To make 1, you can do 4 / 4 + 4 – 4. In fact, you can make all the numbers up to about 20 using only the basic arithmetic operations of addition, subtraction, multiplication, and division.

But soon that’s not enough. To start reaching bigger numbers, the video explains, you must pull in more sophisticated operations like square roots, exponents, factorials (4!, or 4 x 3 x 2 x 1), and concatenation (basically, turning 4 and 4 into 44)… More at Popular Mechanics.

Sometimes numbers are more interesting than words.



Categories: Misc

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