What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

The centre of the third figure is empty. What digit should fit inside?

John was writing his first book. After saving the document, he locked his laptop with a password and mentioned some phrases for the hint box.

A friend of his tried opening his laptop but found out that it was password protected. Following is the hint that appeared.
1 mobile 3 books 2 roars 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches.

Can you help him in cracking the password?

Can you count the number of matches in the picture below ?

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly

What has a bottom at the top?

Which five letter word can be added at the end of below word to form a
valid word?

> Pin
> Check
> Boiling
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I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?