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

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

A father's child, a mother's child, yet no one's son.

Who am I?

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

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

What is at the end of a rainbow?

How is the moon similar to a dollar?

What number do you get when you multiply all of the numbers on a telephone's number pad?