Can you replace the question mark with the correct number?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

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?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

What happened when the wheel was invented?

Can you find the company name in the pictogram below?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

If two's company, and three's a crowd, then whats four and five ?

What is the largest number you can write with just 3 digits?