What does the below rebus riddle means?

Readers with excellent focus can find three differences between the camping scene pictures in 16 seconds. Can you? Test your eye power now!

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

By moving just one matchstick, you need to make the below statement true. Can you do it?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?