What four weights can be used to balance from 1 to 30 pounds?

The cream is heavier than Milk. True or False?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

All Marigolds are flowers.
Few Flowers are used to make colors.
Therefore, some Marigold are used to make colors.

True Or False?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211