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

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth, the other always lies and you don't know which is which.
What is the question you ask?

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

Identify The phrase in the picture.

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?