When we see 2 but call 10?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

What makes this number unique: 8,549,176,320?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

Why do we preferably have round manhole covers and not square ones?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?