Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

I am sure no one can have two things for dinner. what are they?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

What is more useful when it is broken?

Replace the question mark in the picture below.

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

What breaks yet never falls, and what falls yet never breaks?

I’m tall when I’m young, and I’m short when I’m old. What am I?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?