Q1.Let p, q, and r be propositions and the expression (p → q) → r be a contradiction. Then, the
expression (r → p) → q is
Answer : Option DExplaination / Solution:
(p →q) → r is contradiction only when
And now for the above combination, the expression (r → p) → q is always true when q is
true. When q is false in the above combination (third one) (r → p) → q will be false.
Q3.A contour line joins locations having the same height above the mean sea level. The following
is a contour plot of a geographical region. Contour lines are shown at 25m intervals in this
plot. If in a flood, the water level rises to 525m, which of villages P,Q, R, S,T get submerged
?
Answer : Option CExplaination / Solution:
The given contour is a hill station, the peak point of this hill station is P, it is under a contour
of 550 . At floods, the water level is 525m. So the village of R, S and T are under a contour of
500. Therefore these villages are submerged.
Q5.Six people are seated around a circular table. There are at least two men and two women .
There are at least three right-handed persons. Every woman has a left-handed person to her
immediate right. None of the women are right-handed. The number of women at the table is
Answer : Option AExplaination / Solution:
Out of six people, 3 place definitely occupied by right handed people as atleast 2 women are
there so these two will sit adjacently. Now as only one seat is left it will be occupied by a left
handed man because on right side of this seat is sitting an right handed man.
Therefore, answer should be 2 women.
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0