What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

There are seven sisters in a house in a village where there is no electricity or any gadget.

Sister-1: Reading Novel
Sister-2: Cooking
Sister-3: Playing Chess
Sister-4: Playing Sudoku
Sister-5: Washing clothes
Sister-6: Gardening

what is Sister-7 doing ?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

What occurs twice in a week, once in a year but never in a day?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

What jumps when it walks and sits when it stands?

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?

During which month do people sleep the least?

Prove that the below maths equation is true.

8 + 8 = 91