Logical Reasoning - Logical Problems - Discussion

Each problem consists of three statements. Based on the first two statements, the third statement may be true, false, or uncertain.

5. 

Three pencils cost the same as two erasers.
Four erasers cost the same as one ruler.
Pencils are more expensive than rulers.
If the first two statements are true, the third statement is

[A]. true
[B]. false
[C]. uncertain

Answer: Option B

Explanation:

Rulers are the most expensive item.

Anandhakumar.P said: (Aug 17, 2011)  
3 penclis=2 erasers---------->eraser
pencil

4 erasers = 1 ruler------------->ruler
eraser
pencil

Soujanya said: (Aug 19, 2011)  
Here, 1 ruler = 4 erasers = 6 pencils.

So pencils are less expensive when copared with other items.

Vignesh said: (Dec 15, 2011)  
PeNcil=x Eraser=y; Ruler=z

1st statement= 3x=2y......equ 1
2nd statement 4y=1z

multiply equ1 by 2....

6x=4y:

By equ 1 &3, equalling 4y value, we get

6x=1Z: 6Pencils=1 Ruler Cost

Ravinder said: (Sep 16, 2014)  
3 pencils = 2 erasers---------->cost of pencil < cost of eraser (1).
4 erasers = 1 ruler------------->cost of eraser < cost of ruler (2).

From (1) & (2).

Pencil< eraser < ruler.

So statement is false.

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