Find the missing number in the sequence below:

You can hear me, but you can't touch or see me.

What am I?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

What has many teeth, but cannot bite?

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

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

What is 3/7 chicken, 2/3 cat and 2/4 goat?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

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 ?