Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

How can you write nineteen in a manner that if we take out one, it becomes twenty?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

In the four images below, can you find the odd one out?

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

Replace the question mark in the picture below.

What does the below image rebus riddle means ?

What is the longest word in the dictionary?

I know a nine-letter word having only one vowel.
Do you ?