10+10 and 11+11 can give you the same answer.

Explain how?

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?

12345 a famous South Indian actor
567 is a path in jumbled form
8 & 10 are same letters
9 is one among the first six alphabets.
WHO AM I?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

How many times in a given day, minutes and hour clock comes in a straight line ?

Birbal was jester, counsellor, and fool to the great Moghul emperor, Akbar.
The villagers loved to talk of Birbal's wisdom and cleverness,
and the emperor loved to try to outsmart him.
One day Akbar (emperor) drew a line across the floor.
"Birbal," he ordered, "you must make this line shorter, but you cannot erase any bit of it."
Everyone present thought the emperor had finally outsmarted Birbal.
It was clearly an impossible task.
Yet within moments the emperor and everyone else present had to agree that Birbal had made the line shorter without erasing any of it.
How could this be?

Can you write down eight eights so that they add up to one thousand?

I am white when I am dirty, and black when I am clean. What am I?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

How many triangles are there in the picture below?