Acertain aquarium holds 20 water. how many quarts does the aquarium have

Hi!  The answer is 80 quarts.  1 gallon is equivalent to 4 quarts.  And 20 gallons is equivalent to 80 quarts.  So, 20 x 4 = 80.  Hope this helps! :-)

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.