Which flower has two lips?

Can you name four days which start with the letter 'T'?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

Prove that the below maths equation is true.

8 + 8 = 91

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?

Can you find the thief by just looking at the picture below?

What has to be broken before you can use it?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Find the smallest sentence with all the English alphabet.

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?