You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

What is next number in the pattern below:

131 517 192 123 ?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

Give it food and it will live; give it water and it will die.

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

What is harder to catch the faster you run?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?