CBSE - Aptitude Mathematics

Two numbers are in the ratio of 2 to 3, and if 9 be added to each, they are in the ratio of 3 to 4. The numbers are 1. 6 and 9 2. 18 and 27 3. 12 and 18 4. 8 and 12

Which of the following is not true about harmonic mean? 1.it utilizes all the items of the data 2.it lends itself to algebraic calculation 3.it is not easily calculated 4.it can be obtained by inspection

The greatest negative integer is (1) 0 (2) 1 (3) -1 (4) Does not exist

If P (-1, 4, -3) is one end of a diameter PQ of the sphere x + y + z - 3x - 2y + 2z - 15 = 0, then the co-ordinates of Q are: 1. (-2, 4, -1) 2. (-4, 2, 1) 3. (4, 2, -1) 4. (4, -2, 1)

The relational between -7/10 and 2/3 is 1. -7/10 &gt; 2/3 2. -7/10 &lt; 2/3 3. -7/10 = 2/3 4. none of the above