A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

When can we add 2 to 11 and get 1 as the correct answer?

Take one out and scratch my head, I am now black but once was red. What am I?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

How is the moon similar to a dollar?

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?

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

A cricket has 6 legs, a squirrel has 4 legs and a spider has 8 legs.

In a local zoo, it was found that the total number of legs is 612. Also, there are equal number of each of the above animals/insects.

Can you find out how many animals are there in the zoo?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?