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vote
0answers
136 views

Magic Square Combinatorics

This question has been noted to be close to a Project Euler question. Please Help me with this question:Considering a 4*4 magic square ,How many ways are there to fill each square with an integer ...
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1answer
136 views

Euler's Numerical method help

Consider this differential equation, $dy/dx = x + \sin(y)$ with initial condition $y = 0.5$ when $x = 1.2$: Write down the recurrence relation for Euler's numerical method ...
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4answers
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Find the sum of all the multiples of 3 or 5 below 1000

How to solve this problem, I can not figure it out: If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23. Find the sum of ...