What number do you get when you multiply all of the numbers on a telephone's number pad?

There is something which you can be arrested for attempting but not for successfully completing.

Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?

Move three sticks of the spiral below to form a square.

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

No matter how little or how much you use me, you change me every month. What am I?

What is the next number in this matchsticks series riddle?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?