Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Two fathers and two sons decided to go to a shop and buy some sweets upon reaching. Each of them bought 1 kg of sweet. All of them returned home after some time and found out that they had 3kg of sweets with them.

They did not eat the sweets in the way, nor threw or lose anything. Then, how can this be possible?

Find the next number in the sequence

5 12 24 36 ?

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 ?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

What Does this text mean:

important=important

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Can you count the number of squares in the figure below?