level 1 Puzzles

Level 1
The below given are really smart puzzles to be solved, strain your brain.
Initially try to solve each puzzle without writing anything and just using "RAM" of your brain.
I'll soon post the answers of the below given questions
(The answers to the below puzzles may theoretical or numerical)

1.Only one of these five statements is correct - which is it?
(1) Only one of these statements is false.
(2) Only two of these statements are false.
(3) Three of these statements are false.
(4) Four of these statements are false.
(5) All five of these statements are false.
ans-4th statement

2.Which number when added to 5/4 gives the same result as when
it is multiplied by 5/4?
ans- 5

3.A girl has as many sisters as she has brothers. But each brother
has twice as many sisters as brothers. How many brothers and
sisters in the family?
ans-4 sisters and 3 brothers
4.If the only sister of your mother's only brother has an only child,
what would be your relationship to that child?
ans-urself

5.If a brick weighs seven pounds plus half a brick, what is the
weight of a brick and a half?
ans-21pounds

6.There are eight oranges in a box. How can you divide them
between eight people so that each person gets one orange, and
one orange is still left in the box?
The oranges must not be peeled or cut.
ans-give away 7 oranges and give the box with an orange in it to the last person.