I HAVE 50RS SPENT 20 BALANCE 30 I SPENT 15 B RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

This one is best solved working backwards, the last part David spent half of what was left plus $1.00 on candy and then was out of money. That means he must have spent $2.00 on Candy as $1.00 was half of what he had using the same logic backwards: $2.00 on candy $6.00 on Balloons and Streamers $12.00 on the cake Total of $20.00. Did you answer this riddle correctly?
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1757 was room number Did you answer this riddle correctly?
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STEP 1: Divide it into sets of three. If you put one set on either side, it'll either equal the same, or you'll see which set is lighter. Either way, you narrow it down to three balls.

STEP 2: put two of the balls on the scale. If they're equal, the last ball is defective, but if not, the scale will tell you which one is lighter. Did you answer this riddle correctly?
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At least 23 people. Did you answer this riddle correctly?
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The human brain. Did you answer this riddle correctly?
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A monkey Did you answer this riddle correctly?
YES  NO  

The bear is white since the house is built on the North Pole. Did you answer this riddle correctly?
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When it's a grey-hound! Did you answer this riddle correctly?
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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?
YES  NO  

He was born in the town of March, about 25 miles north of Cambridge, England. He grew up to be the mayor of his town, and performed the wedding ceremony for the head of his local church. Did you answer this riddle correctly?
YES  NO