What is the next shape from answers A, B, C, and D figure?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

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

A Car driver was heading down a street in Washington. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the right side of the road past a cop car. Still, he didn't break any traffic laws. Why not?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

Can you count the number of quadrilaterals in the picture below?

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

What does this rebus means ?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?