If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

What is the next number in the series?

15 29 56 108 208 ?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

In which direction should the missing arrow point?

James ordered a fishing rod, priced at $3.56. Unfortunately, James is an Eskimo who lives in a very remote part of Greenland and the import rules forbid any package longer than 4 feet to be imported. The fishing rod was 4 feet and 1 inch, just a little too long, so how can the fishing rod be mailed to James without breaking the rules? Ideally James would like the fishing rod to arrive in one piece!

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

How can you tell a raw egg from a hard-boiled egg?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

What has 88 keys?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.