If it took eight men ten hours to build a wall, how long would it take four men to build it?

A spaceship was lost. The detective was given a piece of paper. This was the location of the spaceship! This is what the slip had scribbled on it:
Juice, Umbrella, Potato, Ice, Tomato, Elephant, Rice.

Where is the spaceship?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

Which word does the below Plexor means ?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

what's the probability of getting a king or a queen from a pack of 52 cards?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Which digit occurred maximum times between the number 1 and 1000?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?