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

If you say my name, I will no longer exist. What am I?

I have an eye but still cannot see.

Who am I?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

Can you place six X (crosses) in below board without making three in a row in any way ?

You are given a set of weighing scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other. The 12 marbles appear to be identical. 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more. Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Which city is three-fifths chick two third cat and 50% goat?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C