Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

Can you find the hidden animal in the picture below?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Find the next number in the series below

21 32 54 87 131 ?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?