The 5 Hardest Surds Questions | Grade 7-9 Maths Series | GCSE Maths Tutor

A video revising the techniques and strategies for answering some of the hardest surds questions. (Higher Only)

Don’t forget to check out the rest of the surds series below!

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🔹 Watch the video
🔹 Make notes
🔹 Practice the questions
🔹 Mark your work
🔹 Review what you have learnt on the exam questions

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[KK-mkxb]

these type of videos are the best ones! love the 7-9 maths series, so helpful

[tpr]

With this guy I don't think we can call these questions hard anymore

[adhalex]

This man has helped me so much. I can’t thank you enough. My grades have skyrocketed as a result of this channel. You are incredible!!

[idrk]

Could you do Grade 9+ videos? I.e. Questions that are so hard they’re borderline Maths A Level stuff. I say this because when you’re thrown in the deep end, the once-difficult stuff isn’t as difficult anymore

[juliethmoreno]

I got the last one correct at first try and it gave me the confidence for next week exam, THANK YOU

[geetikagupta]

i really needed practice with surds so thank you so much for this

[hettysinclair]

this has saved me for tomorrow thank you sir

[gvrrdsx]

For the last question you can work out the value of x using simultaneous equations if you do the following:

y = the multiplier between each term

y(rootx-1)=1

and

y=rootx+1

Solve via substitution and you get x=2. Then for the second part you can work out an equation for the nth term as we know the value of x we would do:

(root2 +1) which is the value of y(the multiplier between terms)

so nth term = n(root2 +1) +2 as you add 2 to (root2-1) to get (root2+1)

[adili]

Why did you use 2 root 2 +2 instead of 2 root 2 -2 on the first question at 3.05?

[amlanbhowmik]

For question 3, couldn't you just multiply it by 2-√2/2–√2 and get the answer by just simplifying?

[cat-crewplayz]

honestly quickfired ur surds videos watched them in 10 mins attempted these grade 9 questions gottem right thanks man

[Kamile]

My only regret is not finding your channel earlier 😢

[Mathspaperksks]

Very useful sir good job keep up your amazing work sir. Thank you for your time.

[beomgyusberry]

for the first question, why did you simplify the 16 down to a 1?

[ameliaroberts]

on question 2, when you rationailized it you put 11+6 root 2, but i thought it would have been timsing the numerator and denominator by -11 -6 root 2

[millazigangirova]

(Im gonna use / as root) I’m a bit confused on why you added ( onto the 2/2 - 2 ) 2/2 + 2 can you please explain? Also at the end you got 16/2 + 16, why did you change it to 16( 1 + /2) where did the other 16 go?

[robbolewis]

At 3:03 why do you rationalise the denominator by multiplying it by 2root2 +2 instead of 2root2 -2 like it is previously in the question.
How do I know what I should be multiplying the denominator by.

[MAN]

At 9:22, can't you multiply by 49 to get rid of the fraction so it matches the way they want it written? So can the answer be 1127+833root2 ?

[kcx]

For the first question I got confused how you factorised 16root2 + 16 can anyone explain the steps ?

[trpp]

I had the first question in my mock exam, it was only 3 marks..