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

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Which is the correct shadow of the bird?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

I have branches, but no fruit, trunk or leaves. What am I?

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

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Find the value of "a" by solving the maths equation in the picture below: