
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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January 9th, 2018, 10:22 AM  #1 
Newbie Joined: Jan 2017 From: London Posts: 4 Thanks: 0  Handling Numbers
Hi All, I'm stating out again to learn some mathematics because of mainly my interest in science and my job in finance. I'm working through a book on Foundation Mathematics and I'm struggling with the exercises attached. Particularly the following items: Q1b...I make it out to be 1/4sqt81? Q2..Total guess but I make it out to be 1 meter Q4...No clue whatsoever apart from knowing 880 in base 10 has 8*10^2, 8*10, 0 Q6a... I make out to be 1/(8/15) Q6b sqt7/12 Q7...Didn't understand this question Q8...I make out X can be 3, 4, 5, 6, 3, 4, 5, 6 Q10...I make 4% gain Q11...I make out 9/25...How would you approach this? Q13...No clue Thanks 
January 9th, 2018, 04:50 PM  #2 
Math Team Joined: Jan 2015 From: Alabama Posts: 3,261 Thanks: 894 
Sigh. What you wrote was 1/4 times the square root of 81 which is 9/4 and not the correct answer to the problem. I suspect that you meant "fourth root of 81" which is correct but would be better written as "3".

January 9th, 2018, 05:15 PM  #3 
Global Moderator Joined: Dec 2006 Posts: 19,723 Thanks: 1807 
Sigh. 1(b) 2^(2) = 1/4, and 81^(1/4) = 1/3. 2 10 minutes is 60 times 10 seconds, so the answer is 6$x$. 4 In our decimal system, the Betzelgar base is 7. 6(a) 1/(8/15) = 15/8 (or 1 7/8) 6(b) (√3)/6 or 1/(2√3) 7 What part(s) didn't you understand? 8 The collection consists of the intervals [4,1] and [3,6]. Note that the values needn't be integers. 10 4% is correct. 11 36/99 = 4/11 13 The base is 6. 
January 11th, 2018, 09:43 AM  #4 
Newbie Joined: Jan 2017 From: London Posts: 4 Thanks: 0 
Thanks for you contribution guys @ Country Boy and skipjack. For some of the answers provided I have seen the errors or my ways and for others I'll pour over them once more


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