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The quotient of dividing 249 by 21 is 11, with a remainder of 18. Therefore, 21 can go into 249 11 times with a remainder of 18.
Sadly, no. 21 is almost 91% bigger than 11, so there's not nearly enough room in 11 to stuff the whole thing in there.
Once with a remainder of ten
21 over 11 = 21/11 in fraction
330 is divisible by 3 , 10 and 11.