Logic - General Aptitude - General Aptitude (GA) Previous Year Questions

Many cranes are highly endangered and are often raised in captivity in zoos by having wild-collected eggs hatched in incubators. The hatchlings are then reared by the zoo keepers in the absence of adult cranes. In order to ensure successful reproduction of these zoo-reared cranes in the wild, which of the following should NOT occur?

Many agriculturally important insect pests belong to which of the following groups?
P) Coleoptera, Q) Odonata, R) Lepidoptera, S) Orthoptera, T) Chiroptera

From an original population P of a butterfly species, two experimental populations X and Y were established. In X, males and females were maintained in standard conditions, and females were allowed to mate and lay eggs. Only eggs from females laying small clutches, i.e., S eggs or fewer, were allowed to hatch and the rest were not utilized. In Y, males and females were maintained in standard conditions and females were allowed to mate and lay eggs. From each female, S eggs were randomly selected and allowed to hatch, and the rest were not utilized. After 20 generations of these experimental conditions, relative to the original population P, and assuming that clutch size is under genetic control, we expect clutch size to be ________ in X and ________ in Y.

(A) same, same
(B) reduced, same
(C) same, reduced
(D) reduced, reduced

Redox potential (Eh) indicates the capacity of atoms, ions, or molecules to donate or accept electrons (i.e., electric potential of energetic transformation during chemical reactions). For reactions involving the nitrogen cycle, Eh values are the following:

Reaction	Eh (volts)
NO3- to N2	+0.75
NO3- to NO2-	+0.42
NO2- to NH4+	+0.34
N2 to NH4+	-0.28

A consequence of these differences is that:

(A) N-fixation is energetically unfavourable
(B) denitrification is energetically unfavourable
(C) both N-fixation and denitrification are energetically favourable
(D) both N-fixation and denitrification are energetically unfavourable

Anita wants to study the effect of Compound X on leaf expansion rates in 100 individuals of a plant species S. Which of the following constitute suitable control(s) for this experiment?
(P) Simultaneously measure leaf expansion rates in a second set of 100 plants of species S which has not been treated with Compound X.
(Q) Measure leaf expansion rates in a second set of 100 plants of species S which has been treated with Compound X for a longer duration.
(R) Measure leaf expansion rates in a set of 100 plants belonging to a different but closely related plant species treated with Compound X.
(S) Measure leaf expansion rates for a second set of 100 plants of species S treated with Compound X to test for repeatability of results.

Given that \(a\) and \(b\) are integers and \(a + a^2 b^3\) is odd, which one of the following statements is correct?

In the 4 × 4 array shown below, each cell of the first three columns has either a cross (X) or a number, as per the given rule.

1	1	2
2	X	3
2	X	4
1	2	X

Rule: The number in a cell represents the count of crosses around its immediate neighboring cells (left, right, top, bottom, diagonals).
As per this rule, the maximum number of crosses possible in the empty column is

In the square grid shown on the left, a person standing at P2 position is required to move to P5 position.

The only movement allowed for a step involves, “two moves along one direction followed by one move in a perpendicular direction”. The permissible directions for movement are shown as dotted arrows in the right.

For example, a person at a given position Y can move only to the positions marked X on the right.

Without occupying any of the shaded squares at the end of each step, the minimum number of steps required to go from P2 to P5 is