What number when divided in half becomes zero?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

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

You see me once in June, twice in November, and not at all in May. What am I?

Find the smallest sentence with all the English alphabet.

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?