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# Maths multiple choice help!

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1. https://gyazo.com/21f4ef7ec7359d293e9024025e2d6dc4

https://gyazo.com/e0ae5b4b5f5bd6f12e6d902541ef0273

How do you go about solving or whats the method behind doing the questions above?

Lecturer hasn't posted the lecture online so I can't review it.

Any help?
2. (Original post by XxKingSniprxX)
https://gyazo.com/21f4ef7ec7359d293e9024025e2d6dc4

https://gyazo.com/e0ae5b4b5f5bd6f12e6d902541ef0273

How do you go about solving or whats the method behind doing the questions above?

Lecturer hasn't posted the lecture online so I can't review it.

Any help?
First lot: just do the division. You can see that 875 is divisible by 5, so divide by 5 and see what's left.

Second one: go through and count the primes. 31 is prime, 33 isn't (3 goes into it), 35 isn't (5 goes into it), 37 is, etc.

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