Replace the question mark with the correct number below.

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

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Can you find the thief by just looking at the picture below?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?