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How many trailing zeros are there in 100! (100 factorial)?

We will answer this by considering the numbers which contribute towards trailing zeros and by calculating how many such numbers there are within 100!. The solution should enlighten the student on the use of ...
WA
Answered by Waseem A. • PAT tutor
2882 Views

What is Iago's motivation in Othello?

That is such a good question, because there are so many ways to answer it! Iago is a classic example of the 'Machiavellian' villain, something found all the time in works from Shakespeare's era. So, there's ...
AS
12695 Views

What are the differences in the structures of arteries and veins?

Arteries have a much narrower lumen (the middle bit of space) and a much thicker wall. This is due to the fact that arterial walls contain more muscle and elastic fibres, than those of veins. Reason: Arterie...
MC
Answered by Matilda C. • Biology tutor
4577 Views

When comparing two texts, where should I start?

Comparing two texts is notoriously hard, especially if at first they don't seem to have anything in common. Unfortunately, I have some bad news for you: it's a skill you're going to keep needing for a long t...
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Answered by Abigail S. • English tutor
9335 Views

What is the best way to answer a Section B question (Edexcel), or a sources question?

When you're doing a question that focusses on sources it is important to make sure you have time to plan, at least 10-15 minutes. If you rush to writing as soon as you start you might miss something so read ...
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Answered by Ruth H. • History tutor
10999 Views