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how do I solve this without a calculator?



and without working out 6x6x6x6x6 - 6x6x6x6 exactly is there a simple way to do this?
Original post by medhelp


and without working out 6x6x6x6x6 - 6x6x6x6 exactly is there a simple way to do this?


Yes. There is a simple way to solve this problem without a calculator.

Do you know how to simplify x4−x3x^4-x^3?
Original post by medhelp


and without working out 6x6x6x6x6 - 6x6x6x6 exactly is there a simple way to do this?


let x = 6^4 and try solving it this way?
Reply 3
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ASF99
4
Original post by medhelp


and without working out 6x6x6x6x6 - 6x6x6x6 exactly is there a simple way to do this?


Factor out 6^4
Original post by IWMTom
6^5 minus 6^4 is the equivalent of 6^1, which is 6.


Is it...?
Original post by IWMTom
6^5 minus 6^4 is the equivalent of 6^1, which is 6.

You're then left with the fraction being 6/5.

The answer is B.


The answer isn't B. It should be E.

Factorise out 6^4, and then you'll see how to get rid of the 5 entirely.
Reply 6
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IWMTom
20
Original post by RDKGames
Is it...?


And that, ladies and gents, is why I dropped A Level Maths :facepalm:

I'm tired okay!
Original post by IWMTom
6^5 minus 6^4 is the equivalent of 6^1, which is 6.

.


I think you're getting subtraction and division mixed up.
Reply 8
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IWMTom
20
Original post by SlashaRussia
I think you're getting subtraction and division mixed up.


As above! You're absolutely right :')
Factorise the top and see if you cancel. Hint, the 5 can be cancelled.
Original post by medhelp


and without working out 6x6x6x6x6 - 6x6x6x6 exactly is there a simple way to do this?

factor out 6^4 you get 6^4(6-1)/5=6^4x5/5=6^4 so E
factorise out 64
Reply 12
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medhelp
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14
Original post by Kvothe the Arcane
Yes. There is a simple way to solve this problem without a calculator.

Do you know how to simplify x4−x3x^4-x^3?


no i dont
Original post by medhelp
no i dont


Do you know how to simplify 4x-4y?
Reply 14
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medhelp
OP
14
Original post by Kvothe the Arcane
Do you know how to simplify 4x-4y?



take out the 4 (?)


6^4 is the highest common factor in the original wait but wouldnt that make 6^4 (6-1) = 6^4 x 5 which isnt an option?
(edited 6 years ago)
Original post by medhelp
take out the 4 (?)


6^4 is the highest common factor in the original wait but wouldnt that make 6^4 (6-1) = 6^4 x 5 which isnt an option?


Ah, you understand it!
Great so you have 64×55\dfrac{6^4 \times 5}{5}

Can you think about what you might do next?
Reply 16
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medhelp
OP
14
Original post by Kvothe the Arcane
Ah, you understand it!
Great so you have 64×55\dfrac{6^4 \times 5}{5}

Can you think about what you might do next?


forgot about the 5 underneath lol
cancel out the 5s to get E

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