No one wants to have it, but if one got it, he does not want to lose it. What is It?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

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

PS: You may start the number from 0.

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

A cat, a dog and a monkey were stolen. 3 suspects got caught: Harish, Manoj and Tarun. All we know is each person stole one animal, but we do not know who stole which. Here are the investigation statements. Harish said: Tarun stole the cat. Manoj said: Tarun stole the dog. Tarun said: They both were lying. I did not steal the cat or the dog. Later on, the police found out the man who stole the monkey told a lie. The man who stole the cat told the truth. Can you find out who stole which?

In the given picture, in how many ways can you read the word "Tiger"?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.