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With a bit of imagination, anything is possible. I tried it myself for two seconds before looking it up.
I found the answer on page 192 in The Canterbury Puzzles and Other Curious Problems.
You not only arrange three nines, but you also introduce a bit of mathematical notation (a plus sign, a ratio, and a decimal point).
The answer is (9+9)/.9
In adding 9 and 9 you get 18. You then divide it by .9 (or 9/10).
18/(9/10) = (18*10)/9 = 180/9 or 2*10 = 20
Or you could just pop it into a calculator and get 20 that way.
When I first saw the question, I thought you wanted the numbers to look like '20'.
With a bit of imagination, anything is possible. After all, 9+9=21.
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Use three 3's to make 24?
Three cubed minus three equals twenty four.
How many nines are in a billion?
Well, honey, there are nine nines in a billion. Simple as that. Just count those zeros and you'll see it for yourself. Don't make it harder than it needs to be, darling.
In the book The Little Prince what purpose do chapters twenty two and twenty three serve?
the purpose is that poo is used to make houses
What are the change combinations to make seventy eight cents?
three twenty five cents, and three one cents
How can you make the number 100 using four nines?
99 divided by 0.99
