Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

What number when divided in half becomes zero?

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

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

What is the probability of choosing the correct answer at random from the options below?

a) 1/4
b) 1/2
c) 1
d) 1/4

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

Which is heavier: a ton of bricks or a ton of feathers?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?