What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

There are 4 big houses. They are made from the materials: red marble, green marble, white marble and blue marble.

* Mrs Jennifer's house is somewhere to the left of the green marble one and the third one alone is white marble.
* Mrs Sharon owns a red marbles house and Mr Cruz does not live at either end, but lives somewhere to the right of the blue marbles house.
* Mr Danny lives in the fourth house, while the first house is not made from red marble.

Who lives where, and what is their house made from?

Can you find the key in the picture below?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

Can you spot the man between the coffee bean in the picture below ?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?