Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

On a beautiful Sunday morning, You ordered a hot tea to your hotel room and suddenly you remember an important thing that needed to be done right now will take around 3 minutes to complete.
Like most people you like your tea to be hot while drinking so, when should you pour cream in the tea?
1. straight away
2. Just people, you drink the team
3. Its does not matter

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

What does this simple rebus mean?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?