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Dec 1, 2014
 what is the square root of 64,000?3 Answersdon't say 80.10^0.5*80=253Wrong Above~ The point is to get the answer without a calculator! The fairly easy way is to use Newton's method or Taylor expansion to get sqrt(10).

Oct 13, 2011
 You have 5 unknown numbers. There are 10 options in selecting two out of these five. Sum each of those two together, thus you have 10 numbers. You're given these, find the original 5 numbers. 5 AnswersSuppose - x1+x2= a1, x1+x3=a2, ..., x4+x5=a10. A = a1+...a10. x1+x2+x3+x4+x5 = A/4. x1 = A/4-a5-a10. x2 = A/4-a2-a10. x3 = A/4-a1-a10. x4 = A/4-a1-a9. x5 = A/4-a1-aa8.Note that a+b=c+d. So the ten sums can be paired up into groups of 2 (of course, it may be possible to group say 4 together in case two of the original numbers are the same... but we will be content with pairing in twos to get a final list of 5 numbers even if that contains repetitions. Suppose the numbers we have now are a1, a2, a3, a4 and a5. And suppose the original numbers are x1, x2, ... x5. Then sum of x's = sum of a's./2. Call this S. S - 2ai will give the original x's.This is a Gaussian equation is it not?Show More Responsesthe problem is that you don't know which sum comes from which two. First, easily you can get x1+x2+x3+x4+x5=A (suppose x1<=x2<=x3<=x4<=x5) Then sort the ten numbers, A-(the smallest sum)-(the largest sum)=x3 pick the next smallest sum, you know it is x1+x3, you can then get x1,x2 pick the next largest sum, you know it is x3+x5, you can then get x4, x5If numbers are a,b,c,d,e in order, you can know a+b,a+c,d+e,c+e, and a+b+c+d+e which is enough

Sep 13, 2016
 2 Players (A and B) compete to get a soda from a vending machine, where n coins are required per machine for j machines. The game proceeds one turn at a time. What is the optimal strategy? Does a certain set of machines/coins per machine give the first player the advantage (and same for the second)? Can you guarantee a soda for the player at an advantage?Be the first to answer this question

Nov 10, 2017
 What data structure would be the best for a certain scenarioBe the first to answer this question

Sep 27, 2017
 Suppose a collection of n random variables have all pairwise correlations equal to c. Find, with proof, the range of possible values of c. 1 Answerhttps://math.stackexchange.com/questions/265685/pairwise-correlation-of-three-random-variables

Oct 18, 2009
 How would you remove an element from a singly-linked list?Be the first to answer this question

Jan 11, 2017
 Have you learned machine learning?Be the first to answer this question

Oct 13, 2011
 Sorting 4 digit numbers in a square.1 Answerwut