Riddles of What makes ice to be nice

Use only 8's to make 1000. You can only use addition.

Answer

888 + 88 + 8 + 8 + 8 = 1000

I am a fruit. If you take away the first letter of my name I become a crime. Take away the first two letters of my name I become an animal. Take away the first and last letter of my name and I become a form of music.
What am I?

Answer

Grape Rape Ape Rap.

What type of cheese is made backwards?

Answer

Edam

If some persons can do a piece of work in 80 days. In how many days two times the number of such persons will do the half of that work?

Answer

20 days.

f the persons can do the work in 80 days, means the work requires the input of 80 man-days. If 2 such mens are engaged they will do the same work in 80 man-days/2 men = 40 days. If half the work needs to be completed it will be done in 40/2 = 20 days.

What is the bird that ...
fly higher than the highest mountain

Answer

All, the mountains do not fly.

If I have three oranges in front of me and I pick
two up how many do I have?

Answer

Two oranges.

Always in you, Sometimes on you;
If I surround you, I can kill you.
What am I?

Answer

Water.

Why did the hero flush the toilet?

Answer

Because it was his duty!