What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

You are given a set of weighing scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other. The 12 marbles appear to be identical. 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more. Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Which is the rope you never skip with?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

What jumps when it walks and sits when it stands?

Take away the whole and some still remain. What is it?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?