Count the number of balls in picture below:

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

If 21x = 79x, what is the value of x?

What is the Surname of Barbie Doll?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

What has a ring but no finger?

I always drive my customer away.

Who am I?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?