Can you find out the total number of triangles in the given figure?

If 21x = 79x, what is the value of x?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

To tease, King Akbar told his most clever advisor Birbal to give his daughter one thing that she can eat when hungry, drink if she feels thirsty and can burn if she feels cold. King Akbar was shocked when Birbal gave Akbar's daughter one such thing that satisfies all of the above.

What did Birbal give to Akbar's daughter?

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

What number should come in place of the question mark below?

How many triangles are there on the puzzle below?

What does a man do only once in his lifetime, but women do once a year after they are 29?

The centre of the third figure is empty. What digit should fit inside?