...all thw wrong spelling tunred me off, and then I truly think one answer was wrong...to me, the prime numbers bewtween 1-7 would include those, right...?
I get 1+2+3+5+7=18, and they didn't have that as an answer; they didn't even have 10, I don't think, if you ditch the 1 and 7...so, I gave up, since I didn't trust it, and my monitor didn't show me the coloured thingies well enough for me to make any decisions (I have noi red in it)...
Yes, I thought that should be 18 too. (If I remember, they had 17 as an option, which I think is what I put, as I figured they might not be counting 1 as a prime.)
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I get 1+2+3+5+7=18, and they didn't have that as an answer; they didn't even have 10, I don't think, if you ditch the 1 and 7...so, I gave up, since I didn't trust it, and my monitor didn't show me the coloured thingies well enough for me to make any decisions (I have noi red in it)...