Challenger App

Statement :
Orissa and Andhra Pradesh have agreed in principle to set up a joint control board for better control, management and productivity of several inter state multipurpose projects.
Courses of action :
I. Other neighbouring states should set up such control boards.
II. The proposed control board should not be allowed to function as such joint boards are always ineffective.

Three statements are given, followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follows from the statements.

Statements:

All computers are markers.

All erasers are markers.

All pens are erasers.

Conclusions:

I. No pen is a computer.

II. Some erasers are computers.

If 2 is added to each odd digit and 1 is subtracted from each even digit in the number 62478324, then what will be the difference between the highest and the lowest digits in the number thus formed?