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difficult riddles by misronet.com
tease your brain with logic puzzles 

BOOST YOUR THINKING POWERS

A valuable e-book containing difficult riddles, aimed at developing, strengthening and testing your powers of logical thinking.

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Difficult riddles - logic brain Puzzle (05)

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Difficult Riddles are aimed at testing your powers of logical thinking. More difficult riddles are available for purchase. 

Puzzle (05) - The circular railway construction puzzle

By misronet.com

A circular railway project was divided into five successive stages of  construction. The contract for the construction works of each stage was awarded to a different contractor. From the information given below, can you identify the starting and finishing point of each successive stage of construction, and say which contractor was awarded the contract for the construction works of each stage.? Remember that every fact is important and must be considered.

  1. Contractors are referred to by the following symbols: A, B, C, D, E.

  2. The Points between the different stages of the project are referred to by the following symbols: P1, P2, P3, P4, P5. 

  3. Contractor E was awarded the contract for the works of the stage starting at point P4.

  4. The stage from point P5 to point P3 was not the first stage.

  5. Contractor D was awarded the contract for the works of the fourth stage.

  6. Stage 3 finished at point P1, and the contract for the works of which was not awarded to Contractor A.

  7. Contractor C was awarded the contract for the works of the stage ending at point P5.

What are the starting, finishing point of each stage in the project and which contractor would execute the works in each stage?

Starting Point

FinishingPoint

Contractor

Stage 1

Stage 2

Stage 3

Stage 4

Stage 5

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More free difficult riddles:

Puzzles (01) - (04)
Puzzles (06) - (10)
Puzzles (11) - (15)

 

 

How to solve logic puzzles

First you read carefully the statement of the puzzle in the introduction, then draw a chart that takes into account every possibility to be considered in the solution. Next you enter in the chart all the information immediately apparent from the clues, using an ( x )  to show a definite (no), and ( / ), for example, to show a definite (yes). You will find that this narrows down the possibilities, and might even reveal some new definite information. So now, you re-read the clues with these new facts in mind to discover further positive/ negative relationships. Be sure to enter one ( / ) in each row or column of possibilities. Now you may go in for the rest of free logic puzzles in our web site.