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

Rearrange the letters in "new door" to make one word.

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

What English word has three consecutive double letters?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

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?

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

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?