What is next number in the pattern below:

131 517 192 123 ?

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
* Fifth number + Third number = 14
* The fourth number is one more than the second number.
* The first number is one less than twice the second number.
* The second number and the third number equals 10.
* The sum of all five numbers is 30.

What is the code ?

What is the coolest letter in the alphabet?

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

By what process could you make a 'Tea-Table' into food?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

Prove that twice of ten is the same as twice of eleven.

I know a nine-letter word having only one vowel.
Do you ?