# Challenge Math and Brain Teaser Problems!

#62

Most of these were not exactly math problems, but I thought they were cool.

#63
The answer. Do not look if you are trying to figure it out

The car is in Box 2.

If the first box is correct (The car is in this box), the car is in Box 1. So far it makes sense. Now let's take a look at the other boxes. Box 2 says "The car is not in this box". If Box 1 is correct, then Box 2 is false. Which means Box 2 is saying "the car is inside this box". However the car is already in Box 1, then it can't also be in Box 2. So Box 1 isn't true.

If second box is correct (The car is not in this box), the car can be in either Boxes 1 or 3. Box 1 says "the car is inside this box". If Box 2 is true, the Box 1 is false and the car is not inside. Which leaves us to Box 3, which says "the car is not inside Box 1". We already concluded Box 1 doesn't have the car, and now since Box 3 is apparently false, it is saying the car is in Box 1. This doesn't make sense.

Lastly, Box 3. If it is a true statement, it says "the car is not in Box 1." Box 1 says the car is in Box 1, but since we've ruled it out to be false, it means Box 1 doesn't have the car. Box 2, on the other hand, says it doesn't have the car. If that is also false, then it means that Box 2 has the car.

#64

isn't it glass?

#65

10 fish are left in the tank

#66

4

#67

#68
The answer... I have seen this one before xD

The answer is 10. If a fish is in a tank, it can neither drown, swim away or die.

#69
1. Turn the picture around

#70

If the box is in number one, then the other 2 boxes are false. Since only one box is right, the car is in box one

Nice question!

#71

If two is false, then it's in two.

#72
Answois

Box 2.

• If Box 1 is true, Box 2 will say the same thing, ("The car is here") with box 1, so that can't happen.
• If Box 2 is true, Box 3 will say "Box 1 has the car" when it doesn't, because Box 1 will say "The car is not in this box (Box 1)
• If Box 3 is true, Box 3 will say "The car is in Box 1," and Box 1 will say "The car is not in here." The only box left is Box 2, and that box has the car in it. Box 3 is true.

#73

False meaning opposite. False does not mean "cancel out" XD

#74

#75

#76

# Challenge!

How can you add eight 8's to get the number 1,000? (only use addition)

#77

8x125

#78

#79

#80

# Challenge

How can you make 7 using three 6's? (You can use any mathematical operations you want)

#81