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

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

What can you deduce from the following BrainBat?

CRY
LMKI

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?