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

There were two grandmothers and their two granddaughters.
There were two husbands and their two wives.
There were two fathers and their two daughters.
There were two mothers and their two sons.
There were two maidens and their two mothers.
There were two sisters and their two brothers.
Yet there are only six, who are buried here,
All are born legitimate and relationships clear.
How can this happen?

What is next number in the pattern below:

131 517 192 123 ?

Why Wine Glass Stem is so long?

If,

Akriti = 631
Levis = 521
Sroti = 521
Aneel = 533
Then,
Sunil =?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

How can a man go eight days without sleep?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?