Aptitude Tests 4 Me

Basic Numeracy/Quantitative Aptitude

135. For a wall of a given material and of a fixed surface area, the rate of heat loss by conduction through the wall is inversely proportional to the thickness (T) of the wall, and directly proportional to the temperature difference (d) across the wall. The rate of heat loss could be given by which of the following expressions?

 (a) 2d/T (b) 2 T/d (c) 2d + ½ T (d) T/d

136.

The average (mean) number of children per family in the village is approximately

 (a) 2.4 (b) 2.0 (c) 1.8 (d) 1.5

137. Refer to the table provided in the previous question.
The difference between the median and the mode of the number of children per family is

 (a) 2.5 (b) 2.0 (c) 1.5 (d) 0

138. If x is an integer, which of the following could be x³?

I 1.25 x 1017
II 12.5 x 10-12
III 0.125 x 10-12

 (a) I only (b) II only (c) I and II only (d) I and III only

139. At what point does the graph of 5x + 4y = 12 intersect the y-axis?

 (a) (0, 3) (b) (0, -3) (c) (3, 0) (d) (5, 0)

TOTAL

Detailed Solution