who is silent in the parliament?

The centre of the third figure is empty. What digit should fit inside?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?