Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

How could a baby fall out of a twenty-story building onto the ground and live?

What can you deduce from the following BrainBat?

CRY
LMKI

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?

What 5-letter word typed in all capital letters can be read the same upside down?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?