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

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

I know a nine-letter word having only one vowel.
Do you ?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?