I WENT TO SCHOOL WITH NO PENS AND CAME BACK WITH NINE IST WITH ERECTIONS SOMETIME GIANT BALLS HANG FROM ME RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

The 'arrrrrgh'phabet. Did you answer this riddle correctly?
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Just One!

Because we know all labels are wrong.
So the BW box must be either BB or WW. Selecting one ball from BW will let you know which.
And the other two boxes can then be worked out logically. Did you answer this riddle correctly?
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A ton.

Forward I am ton, backwards I am not. Did you answer this riddle correctly?
YES  NO  

Put three balls on each side of the scale. If the arms are equal, you know the heavy ball is one of the two remaining. If the arms are unequal, take the three balls on the heavier side, pick two and weigh them against each other. Did you answer this riddle correctly?
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C-A-T-B-A-C-K-W-A-R-D-S! Did you answer this riddle correctly?
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To become a first aid kit Did you answer this riddle correctly?
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I am playing hopscotch! Did you answer this riddle correctly?
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Not enough, I have to go back tomorrow! Did you answer this riddle correctly?
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Because if they fell forward, they'd fall into the Boat!
Did you answer this riddle correctly?
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A horse. Did you answer this riddle correctly?
YES  NO  

I wouldn't fit through the door. Did you answer this riddle correctly?
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His head! Did you answer this riddle correctly?
YES  NO  

SWIMS. Did you answer this riddle correctly?
YES  NO  

Death Did you answer this riddle correctly?
YES  NO  

9

2 < 3 < 5
To find out the required number of balls, take one in place of the least number (i.e. take one pink ball) and then add all the greater numbers (i.e. three orange and five purple balls) to it.

Required number of balls = 1 + 3 + 5 = 9. Did you answer this riddle correctly?
YES  NO