What does this rebus mean?

O
N
C
E
TIME

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

You visit a home for specially-abled children on the occasion of Christmas where you meet with 50 children. You have a box of chocolates containing 50 chocolates exactly.

What if you were asked to one chocolate to each child in a manner that one chocolate still remains in the box? Is it possible?

Can you count the number of triangles in the given picture?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Find the next number in the following series:
6, 14, 26, 98, __?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?