A river should be crossed by a father, a mother and their two sons and two daughters.
There are some rules that should be followed while crossing the river. There can be only two people in the raft while crossing. The daughters cannot be with their father unless there is the presence of the mother. The sons cannot be with their mothers unless the father is present. Unless the guard is on the board, the criminals cannot be with any of the family members. Only the adults like the father, the guard, and the mother knows to use the raft.

How will they cross the river?

The more it dries, the wetter it becomes. Can you tell what it is?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

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

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

Buy me, smell me or deliver me, I do not change.

Who am I?