2, 3, 5, 9, 17, _ What is the next number in the sequence?

Buy me, smell me or deliver me, I do not change.

Who am I?

What is the word or phrase?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

Which is the rope you never skip with?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

A man dies of old age on his 25 birthday. How is this possible?

What does below chemistry rebus means?

81 x 9 = 801. What must you do to make the this equation true?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.