Replace the question mark with the correct number in the below-given picture?

What Time Should the last watch show in the below figure?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

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?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

What number comes next in the series?

5 15 5 18 5 24 14 20 _

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.