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# Prime Factors watch

1. (Original post by _Xenon_)
I found a trick that gives you the ANSWER!
On casio calculators if it asks for product of prime factors you just type in the number, for example 210 then press shift and fact and it gives the answer, in index form!!
Yep standard calculator trick, but it's good to be able to find them without it
2. (Original post by _Xenon_)
notnek
I found a trick that gives you the ANSWER!
On casio calculators if it asks for product of prime factors you just type in the number, for example 210 then press shift and fact and it gives the answer, in index form!! But they do sometimes want working out but still very good.
Usually prime factorisation appears in the non calculator paper.
3. (Original post by notnek)
It's possible but unlikely that you will lose a mark in the exam for not knowing a large prime. And it would probably only be a single mark.

I recommend that you don't spend any time learning larger prime numbers since you only have 3 weeks. Focus on other topics.
OK i really need someone to explain sets that's pretty much guaranteed I think, it is in virtually every past paper i think. I just don't understand those weird symbols. Should I ask here or new thread
4. (Original post by Math12345)
Usually prime factorisation appears in the non calculator paper.
I'm doing IGCSE both calculator papers.
5. (Original post by Zacken)
Well, not wrong. But he hasn't answered the question properly, yes. He's edited his post to give the correct version now.
Help with sets please, edexcel IGCSE.

Should I post a question from a past paper? Thanks!
6. (Original post by _Xenon_)
Help with sets please, edexcel IGCSE.

Should I post a question from a past paper? Thanks!
I'm not free right now, I've got errands to run, but yeah - post a new thread and I'm sure somebody will be able to help you out.
7. (Original post by _Xenon_)
OK i really need someone to explain sets that's pretty much guaranteed I think, it is in virtually every past paper i think. I just don't understand those weird symbols
Your textbook should be able to explain these.

Going through them all on here may not be the best idea. Unless you have specific symbols that confuse you?

You could start a new thread with a question that you're stuck on and someone will help you.
8. (Original post by notnek)
Your textbook should be able to explain these.

Going through them all on here may not be the best idea. Unless you have specific symbols that confuse you?

You could start a new thread with a question that you're stuck on and someone will help you.
OK I'll see if I can find something online if not I'll ask here
Cheers!! You guys are lifesavers!!! Helped me loads

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