How can you make number one disappear by adding something to it?

What's the best place to go shopping in the ocean?

Find the Goldfish below the given Image.

What is next number in the pattern below:

131 517 192 123 ?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Which is the smallest number that you can write using all the vowels exactly once?

I have thought of a number that is made up by using all the ten digits just once. Here are a few clues for you to guess my number:

First digits is divisible by 1.
First two digits are divisible by 2.
First three digits are divisible by 3.
First four digits are divisible by 4.
First five digits are divisible by 5.
First six digits are divisible by 6.
First seven digits are divisible by 7.
First eight digits are divisible by 8.
First nine digits are divisible by 9.
The number is divisible by 10.

Can you find out the number ?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.