HARDEST BRAIN TESTER RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

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?
YES  NO  

Cindy is holding a fortune cookie. By breaking it in half, she has received not only two halves of the cookie, she now also has the fortune, making the cookie into thirds. Did you answer this riddle correctly?
YES  NO  

Your Eyelashes! Did you answer this riddle correctly?
YES  NO  

An eye Did you answer this riddle correctly?
YES  NO  

A star Did you answer this riddle correctly?
YES  NO  

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?
YES  NO  

Solution 1: Use two cuts to divide the cake into four equal pieces (quarters). For the third cut, cut the cake in half, horizontally. Some pieces may not have any icing, but their size will be equal.

Solution 2: As in the first solution, use two cuts to divide the cake into four equal pieces (quarters). Then, stack the four pieces on top of each other and use a third cut to cut all four pieces in two. Did you answer this riddle correctly?
YES  NO  

Three. Theyre all in a row, so ducks 1 and 2 are in front of duck 3, ducks 2 and 3 are behind duck 1 and duck 2 is in the middle. Did you answer this riddle correctly?
YES  NO  

I am a pineapple Did you answer this riddle correctly?
YES  NO  

I am the hospital Did you answer this riddle correctly?
YES  NO  

Place 1 white marble in one bowl, and place the rest of the marbles in the other bowl (49 whites, and 50 blacks).

This way you begin with a 50/50 chance of choosing the bowl with just one white marble, therefore life! BUT even if you choose the other bowl, you still have ALMOST a 50/50 chance at picking one of the 49 white marbles. Did you answer this riddle correctly?
YES  NO  

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  

A guitar Did you answer this riddle correctly?
YES  NO  

A window Did you answer this riddle correctly?
YES  NO