'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

What is the fastest way to double your money?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

What occurs twice in a week, once in a year but never in a day?

Replace the question mark with the number below given a simple math problem.