60Upper Secondary Big Buttonhttp://nrich.maths.org/secondary-upperen 2012 http://nrich.maths.org/public/terms.phpCan You Traverse It?How can you decide if a graph is traversable?http://nrich.maths.org/11826Wed, 01 Dec 1999 00:00:01 +0000Connecting the UtilitiesCan you find a way to connect each house to the utilities without any pipes crossing?http://nrich.maths.org/11825Wed, 01 Dec 1999 00:00:01 +0000Graphs and Networkshttp://nrich.maths.org/11823Wed, 01 Dec 1999 00:00:01 +0000Who's Who?Can you solve the clues to find out who's who on the friendship graph?http://nrich.maths.org/11821Wed, 01 Dec 1999 00:00:01 +0000Designing a PolynomialCan you find a polynomial function whose first derivative is equal to the function?http://nrich.maths.org/11740Mon, 01 Jun 2015 00:00:01 +0100Curvy CubicsUse some calculus clues to pin down an equation of a cubic graph.http://nrich.maths.org/11739Mon, 01 Jun 2015 00:00:01 +0100Integral ChasingCan you find the missing constants from these not-quite-so-obvious definite integrals?http://nrich.maths.org/11738Mon, 01 Jun 2015 00:00:01 +0100Can You Find... Cubic CurvesCan you find equations for cubic curves that have specific features?http://nrich.maths.org/11737Mon, 01 Jun 2015 00:00:01 +0100Can You Find... Trigonometric Edition Part 2Can you find trig graphs to satisfy a variety of conditions?http://nrich.maths.org/11647Mon, 01 Jun 2015 00:00:01 +0100Which Parabola?Can you work out the equations of all these mixed up parabolas?http://nrich.maths.org/11646Mon, 01 Jun 2015 00:00:01 +0100Slippery SlopesWhen you transform a function, what can you work out about the gradient?http://nrich.maths.org/11645Mon, 01 Jun 2015 00:00:01 +0100Name That Graph AgainIf you know some information about a parabola, can you work out its equation?http://nrich.maths.org/11644Mon, 01 Jun 2015 00:00:01 +0100Irrational ConstructionsWhat questions does the spiral construction prompt you to ask?http://nrich.maths.org/11605Fri, 01 May 2015 00:00:01 +0100Nested SurdsCan you find values that make these surd statements true?http://nrich.maths.org/11597Fri, 01 May 2015 00:00:01 +0100Irrational RootsYou're used to working with quadratics with integer roots, but what about when the roots are irrational?http://nrich.maths.org/11596Fri, 01 May 2015 00:00:01 +0100Staircase SequencesCan you make sense of these unusual fraction sequences?http://nrich.maths.org/11593Fri, 01 May 2015 00:00:01 +0100Have a SineThere's much more to trigonometry than sin, cos and tan...http://nrich.maths.org/11521Wed, 01 Apr 2015 00:00:01 +0100Equation or Identity (2)Here are some more triangle equations. Which are always true?http://nrich.maths.org/11520Wed, 01 Apr 2015 00:00:01 +0100Equation or Identity (1)Which of these equations concerning the angles of triangles are always true?http://nrich.maths.org/11519Wed, 01 Apr 2015 00:00:01 +0100Can You Find... Trigonometry EditionWhat graphs can you make by transforming sine, cosine and tangent graphs?http://nrich.maths.org/11518Wed, 01 Apr 2015 00:00:01 +0100The Circle of Apollonius... Coordinate EditionCan you sketch and then find an equation for the locus of a point based on its distance from two fixed points?http://nrich.maths.org/11486Sun, 01 Mar 2015 00:00:01 +0000Finding CirclesCan you find the centre and equation of a circle given a number of points on the circle? When is it possible and when is it not?http://nrich.maths.org/11485Sun, 01 Mar 2015 00:00:01 +0000Quadrature of the LunesA lune is the area left when part of a circle is cut off by another circle. Can you work out the area?http://nrich.maths.org/11484Sun, 01 Mar 2015 00:00:01 +0000The Quintessential ProofIn this resource, the aim is to understand a fundamental proof of Pythagoras's Theorem.http://nrich.maths.org/11483Sun, 01 Mar 2015 00:00:01 +0000A Big PowerHave you ever tried to work out the largest number that your calculator can cope with? What about your computer? Perhaps you tried using powers to make really large numbers. In this problem you will think about how much you can do to understand such numbers when your calculator is less than helpful!http://nrich.maths.org/11311Mon, 01 Dec 2014 00:00:01 +0000Factorial FragmentsHere you have an expression containing logs and factorials! What can you do with it?http://nrich.maths.org/11310Mon, 01 Dec 2014 00:00:01 +0000Proving the Laws of LogarithmsHere you have an opportunity to explore the proofs of the laws of logarithms.http://nrich.maths.org/11309Mon, 01 Dec 2014 00:00:01 +0000Summing to OneThis problem is a nice introduction that will give you a feeling for how logs work and what that button on your calculator might be doing.http://nrich.maths.org/11308Mon, 01 Dec 2014 00:00:01 +0000Euler's FormulaSome simple ideas about graph theory with a discussion of a proof
of Euler's formula relating the numbers of vertces, edges and faces
of a graph.http://nrich.maths.org/4719Tue, 01 Feb 2011 00:00:01 +0000