Working backwards approach

SSC CGL Algebra solving quickly 13, A novel approach

Submitted by Atanu Chaudhuri on Wed, 03/04/2019 - 16:51

We have solved an apparently unsolvable problem in this 13th video session on SSC CGL level Algebra problem solving in a few steps. We could find no way to transform the given expression to get the value of the target expression, nor could we evaluate the values of three variables directly from the given expression. As these two main approaches by which most competitive algebra problems are solved failed, we had to resort to a novel method using trial of choice values against target expression for feasibility and then verification of the values thus obtained from the given expression. We have worked backwards. Finally, the solution was quick and satisfactory and it taught us a few new things about how to solve problems. The concepts and methods should prove valuable in addition, for SSC CGL Tier II, CAT or GMAT where algebra is a topic...

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Monkey and the coconuts puzzle with solutions

Submitted by Atanu Chaudhuri on Thu, 27/12/2018 - 23:43

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…

SSC CGL level Solution Set 80, Geometry 8

Submitted by Atanu Chaudhuri on Sun, 04/11/2018 - 16:48

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This is the 80th solution set of 10 practice problem exercise for SSC CGL exam and 8th on topic Geometry. You need to take the corresponding test first before referring to this solution set. Some of the problems need suitable approach for quick solution...

SSC CGL Tier II level Solution Set 14, Algebra 5

Submitted by Atanu Chaudhuri on Fri, 14/09/2018 - 22:09

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This is the 14th solution set of 10 practice problem exercise for SSC CGL Tier II exam and the 5th on topic Algebra. To solve such problems quickly, identification of inherent patterns and use of associated methods are necessary. The solution set encapsulates the approach...

NCERT solutions for class 10 maths Trigonometry set 4

Submitted by Atanu Chaudhuri on Fri, 20/07/2018 - 09:19

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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

Submitted by Atanu Chaudhuri on Thu, 10/05/2018 - 01:07

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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 level Solution Set 69, Percentage 3

Submitted by Atanu Chaudhuri on Tue, 20/06/2017 - 22:08

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This is the 69th solution set of 10 practice problem exercise for SSC CGL exam and 3rd on topic Percentage. Students must complete the corresponding question set in prescribed time first and then only refer to this solution set for extracting maximum benefits from this resource...

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

Submitted by Atanu Chaudhuri on Mon, 22/05/2017 - 21:01

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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...

SSC CGL level Solution Set 49, Time and work problems in simpler steps 4

Submitted by Atanu Chaudhuri on Thu, 16/02/2017 - 13:19

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This is the 49th solution set of 10 practice problem exercise for SSC CGL exam and 4th on Time and Work in simpler steps. Students must complete the corresponding question set in prescribed time first and then only refer to this solution set for extracting maximum benefits from this resource...

SSC CGL level Solution Set 48, Time and work problems in simpler steps 3

Submitted by Atanu Chaudhuri on Tue, 14/02/2017 - 20:44

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This is the 48th solution set of 10 practice problem exercise for SSC CGL exam and 3rd on Time and Work in simpler steps. Students must complete the corresponding question set in prescribed time first and then only refer to this solution set for extracting maximum benefits from this resource...

Working backwards approach

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