What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

A couple went on a climbing trip. But only the husband returned from the vacation and said that his wife slipped off while climbing and died. On investigating, the local sheriff arrested him saying, 'Your travel agent called. You murdered your wife.'

The man did not inform anyone about the trip. Then how was the agent so sure that it was a murder?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

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

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

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

Decode below rebus
D
N
A
T
S , D