CBSE - Aptitude Mathematics

The existence of the unique solution of the system x+y+z=b, 2x+3y-z=6, 5x-y+az=10 depends on 1. b only 2. a only 3. a and b 4. neither a nor b

Sita walks 7 km in 1 1/2 hr and Bina 450 min 5 minutes. Who walks faster than 4 1/2 km/hr? 1. Sita 2. Both of them 3. Bina 4. More data is necessary to know the answer

The average of 30 results is 20 and the average of other 20 results is 30. What is the average of all the results? 1) 24 2)48 3)25 4)50

The point on the line 2x - 3y = 5 which is equidistant from (1, 2) and (3, 4) is: 1. (2, 4) 2. (4, 1) 3. (1, -1) 4. (-3, -2)

In an intelligence test, the results were as follows Average marks of X = 40 Coefficient of Variation of X = 25 Average marks of Y = 50 Coefficient of Variation of Y = 40 Our interpretation is 1. X is more intelligent 2. Y is more intelligent 3. both are intelligent 4. none is intelligent