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?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Find the next number in the sequence

1, 2, 6, 21, 88, __?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?