Working backwards approach | SureSolv

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Working backwards approach

Systematic solution to hardest geometry question 16b in NSW HSC Math extension 2 exam 2018


The problem we'll take up this time was reported in The Sydney Morning Heraldas the hardest one in the Math Extension 2 exam paper in NSW HSW 2018 test in Australia. It was the question 16b on Geometry involving a large number of pairs of similar triangles.

Students not used to identify the key missing element from a host of elements spread all around and think strategically and systematically would find it difficult...

Monkey and the coconuts puzzle with solutions


An older version of the monkey and the coconuts puzzle was modified by short story writer Ben Williams and published nearly a century ago. From then on the intriguing puzzle attained the status of one of the most attempted and least solved math puzzles of all time. We will present here easily understandable solutions to both using mathematical reasoning and for the modified version using in addition systematic enumeration…

NCERT solutions for class 10 maths Trigonometry set 4


With initial problem analysis and application of trigonometric expression simplifying and problem solving strategies, the problems chosen in this fourth NCERT trigonometry problem solving session could be solved in a few easy steps. Problem solving approach leads to quick solutions in minimum number of steps...

How to solve arithmetic boundary condition problems in a few simple steps


A simple or compound event (consisting of more than one event) goes on happening systematically at regular intervals till a point just before the end. With each occurrence of the event problem parameters change. The end is reached before the full impact of the event along with the change can happen. This is the boundary to be found out before solving the problem...

SSC CGL Tier II level Solution Set 10, Time-work Work-wages Pipes-cisterns 1

thumb ssc cgl tier2 level solution set 10 time-work work-wages pipes-cisterns 1

This is the 10th solution set of 10 practice problem exercise for SSC CGL Tier II exam and the 1st on topics Time-work, Work-wages and Pipes-cisterns. For maximum gains, the test should be taken first, that is obvious. But more importantly, to absorb the concepts, techniques and deductive reasoning elaborated through these solutions, one must solve many problems in a systematic manner using this conceptual analytical approach. One can learn well only by practicing learning by doing...


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