60Upper Secondary Big Buttonhttp://nrich.maths.org/secondary-upperen 2012 http://nrich.maths.org/public/terms.phpLogs by the Firehttp://nrich.maths.org/11324Wed, 01 Dec 1999 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/11311Wed, 01 Dec 1999 00:00:01 +0000Factorial FragmentsHere you have an expression containing logs and factorials! What can you do with it?http://nrich.maths.org/11310Wed, 01 Dec 1999 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/11309Wed, 01 Dec 1999 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/11308Wed, 01 Dec 1999 00:00:01 +0000Two-way FunctionsThis gives you an opportunity to explore roots and asymptotes of functions, both by identifying properties that functions have in common and also by trying to find functions that have particular properties. You may like to use the list of functions in the Hint, which includes enough functions to complete the table plus some extras.You might like to work on this problem in a pair or small group,
or to compare your table to someone else's to see where you have used the same functions and where not.http://nrich.maths.org/11301Sat, 01 Nov 2014 00:00:01 +0000Approaching AsymptotesCan you describe what an asymptote is? This resource includes a list of statements about asymptotes and a collection of graphs, some of which have asymptotes. Use the graphs to help you decide whether you agree with the statements about asymptotes.http://nrich.maths.org/11300Sat, 01 Nov 2014 00:00:01 +0000Picture the Process IHow does the temperature of a cup of tea behave over time? What is the radius of a spherical balloon as it is inflated? What is the distance fallen by a parachutist after jumping out of a plane? After sketching graphs for these and other real-world processes, you are offered a selection of equations to match to these graphs and processes.http://nrich.maths.org/11299Sat, 01 Nov 2014 00:00:01 +0000Absolutely!What can you say about this graph? A number of questions have been suggested to help you look at the graph in different ways. Use these to help you make sense of this and similar graphs.http://nrich.maths.org/11298Sat, 01 Nov 2014 00:00:01 +0000Order in Disorder - Video<a href="http://mmp.maths.org/leader-order-jun14-video">Professor Imre Leader talks about Ramsey Theory in this video from June 2014</a>http://nrich.maths.org/11282Mon, 01 Sep 2014 00:00:01 +0100Which Quadratic?In this activity you will need to work in a group to connect different representations of quadratics.http://nrich.maths.org/11266Mon, 01 Sep 2014 00:00:01 +0100Factorisable QuadraticsThis will encourage you to think about whether all quadratics can be factorised and to develop a better understanding of the effect that changing the coefficients has on the factorised form.http://nrich.maths.org/11265Mon, 01 Sep 2014 00:00:01 +0100DiscriminatingYou're invited to decide whether statements about the number of solutions of a quadratic equation is always, sometimes or never true.http://nrich.maths.org/11264Mon, 01 Sep 2014 00:00:01 +0100Powerful QuadraticsThis comes in two parts, with the first being less fiendish than the second. Itâ€™s great for practising both quadratics and laws of indices, and you can get a lot from making sure that you find all the solutions. For a real challenge (requiring a bit more knowledge), you could consider finding the complex solutions.http://nrich.maths.org/11263Mon, 01 Sep 2014 00:00:01 +0100Advanced Mathematics on Dotty GridsA dotty grid is a very simple mathematical structure that offers potential for very deep thought...http://nrich.maths.org/10813Sat, 01 Mar 2014 00:00:01 +0000Getting Round the CityIn a city with a grid system of roads, how do you get from A to B?http://nrich.maths.org/10796Sat, 01 Feb 2014 00:00:01 +0000Sketching Graphs - TransformationsIf you can sketch y=f(x), there are several related functions you can also sketch...http://nrich.maths.org/10774Sat, 01 Feb 2014 00:00:01 +0000Find the MetagiffPlay the game. How many guesses do you need to find the Metagiff?http://nrich.maths.org/10749Sat, 01 Feb 2014 00:00:01 +0000Areas from VectorsUse the applet to explore the area of a parallelogram and how it relates to vectors.http://nrich.maths.org/10735Sat, 01 Feb 2014 00:00:01 +0000An Appearing ActCut out and reassemble the pieces. Can you explain what happens?http://nrich.maths.org/10711Sat, 01 Feb 2014 00:00:01 +0000Estimating TimeHow well can you estimate 10 seconds? Investigate with our timing tool.http://nrich.maths.org/10629Sun, 01 Dec 2013 00:00:01 +0000Perception Versus RealityInfographics are a powerful way of communicating statistical information. Can you come up with your own?http://nrich.maths.org/10466Tue, 01 Oct 2013 00:00:01 +0100Simply GraphsLook for the common features in these graphs. Which graphs belong together?http://nrich.maths.org/8257Wed, 01 Aug 2012 00:00:01 +0100SortedHow can you quickly sort a suit of cards in order from Ace to King?http://nrich.maths.org/8192Mon, 01 Oct 2012 00:00:01 +0100Mystery ProcedureCan you work out what this procedure is doing?http://nrich.maths.org/7331Tue, 01 Feb 2011 00:00:01 +0000Whose Line Graph Is it Anyway?Which line graph, equations and physical processes go together?http://nrich.maths.org/6500Tue, 01 Feb 2011 00:00:01 +0000Curve MatchWhich curve is which, and how would you plan a route to pass between them?http://nrich.maths.org/6493Tue, 01 Feb 2011 00:00:01 +0000Data MatchingUse your skill and judgement to match the sets of random data.http://nrich.maths.org/5933Tue, 01 Feb 2011 00:00:01 +0000Odd One OutIn this short problem, can you deduce the likely location of the odd ones out in six sets of random numbers?http://nrich.maths.org/5801Tue, 01 Feb 2011 00:00:01 +0000Loch NessDraw graphs of the sine and modulus functions and explain the
humps.http://nrich.maths.org/2693Tue, 01 Feb 2011 00:00:01 +0000