MATH FOR ADULTS RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

5 eggs are taken by the first 5 people, then the 6th person takes the egg , while its still in the carton!! Did you answer this riddle correctly?
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The $9 paid by each guest accounts for the $2 that went to the bellhop. So rather than adding $27 to the $2 kept by the bellhop, the $27 accounts for the bellhops money. The $27 plus the $3 kept by the guests does add up to $30. Did you answer this riddle correctly?
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240. To get the number, multiply the previous number in the series by its position. 48 is in the 5th position, so 48 � 5 = 240 Did you answer this riddle correctly?
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Current Future Past

Princess x 2z (x+y)/2
Prince y x z

I then created three equations, since the difference in their age will always be the same.

d = the difference in ages

x y = d
2z x = d
x/2 + y/2 z = d

I then created a matrix and solved it using row reduction.

x y z

1 -1 0 d
-1 0 2 d
.5 .5 -1 d

It reduced to:

x y z

1 0 0 4d
0 1 0 3d
0 0 1 5d/2

This means that you can pick any difference you want (an even one presumably because you want integer ages).

Princess age: 4d
Prince age: 3d

Ages that work

Princess:
4
8
16
24
32
40
48
56
64
72
80

Prince:
3
6
12
18
24
30
36
42
48
54
60 Did you answer this riddle correctly?
YES  NO  

50 lbs. Did you answer this riddle correctly?
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She hands the 10th child the jar with one cookie left in it. Did you answer this riddle correctly?
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80 Cherries, 01 Orange and 19 Watermelons. Did you answer this riddle correctly?
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An eye Did you answer this riddle correctly?
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1 10
2 10
3 9
4 9
5 9
6 8
7 8
8 7
9 7
10 7

200-84 = 116 Did you answer this riddle correctly?
YES  NO  

He will have 25 coconuts with him at the end. The trick is to reduce the number of sacks as you pass checkpoints.

The first 10 checkpoints require 3 coconuts each, which empties his first sack. The next 15 checkpoints require 2 coconuts each, which will empty his second stack. Now, he is left with 1 sack and 5 more checkpoints. So, the 5 checkpoints will take 1 coconut each. Therefore, he will be left with 25 coconuts. Did you answer this riddle correctly?
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It was suicide. The man was the smallest midgit in the world and his friend was the second smallest midget in the world and they worked at a circus. His friend was jealous of him so he broke a yardstick (note: that was the broken stick on the bed) and marked it at four feet. When his friend measured his height, it looked like he grew making him very depressed which led to killing himself thus making his friend the smallest midget in the world. (Bet you never saw that one coming). Did you answer this riddle correctly?
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2 people.

It is stated clearly that Mr. and Mrs. Smith went for a picnic. It does not say that the others accompanied them. Did you answer this riddle correctly?
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A washing machine Did you answer this riddle correctly?
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I am holding a knife Did you answer this riddle correctly?
YES  NO  

When you're pregnant! Did you answer this riddle correctly?
YES  NO