You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Replace the question mark with the correct number below.

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

Find the next number in the following series:
6, 14, 26, 98, __?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Find the next number in the series below

21 32 54 87 131 ?

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?