It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Spot 5 differences in two Christmas tree below:

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

I look at you, you look at me I raise my right, you raise your left. What am I?

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

You are trapped into a death trap by the famous jigsaw killer. As usual, a screen flashes in front of you and explains you the trap game. There are 100 pearls kept in a bowl in front of you and an empty bowl. Among the 100 pearls, 50 are white and 50 are black. You can divide them as you like into the two bowls. Once you are done, you will pull a lever, which will turn the room pitch black. The bowls will move and shuffle around. In the dark, you have to pick up one pearl from any bowl. Once you do that, the room will flood with lights again. If the peral you have in your hand is white, you will be allowed to live, but if the pearl you picked is black, the room will be filled with poisonous gas and you will die. How will divide the pearls to increase your chances of survival?

What's the best place to go shopping in the ocean?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

What word begins and ends with an E, but has only one letter?