If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

If 21x = 79x, what is the value of x?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Can you solve below mathematical equation?

2^1234 - 2^1233

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

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

which number am I?