I am a seven-letter word but if you remove four of my letters I will have one left. What word 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 ?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

What Does this text mean:

important=important

Do You See It?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

How many times do a clock's hands overlap in a day ?

By what process could you make a 'Tea-Table' into food?