Why is 6 afraid of 7?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

What is the last thing you take off before bed?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

What does below chemistry rebus means?

Find the next number in the series.
1 10 24 43 67 ?

You can see it everyday, But cannot touch it at will. What is it?