The value of 1/x² + 1/y² where x= 2 +√3 and y = 2 - √3, is

• 12

• 16

• 14

• 14

One-third of one fourth of a number is 12. Then the number is

• 96

• 144

• 108

• 108

A train 300 meters long is running at a speed of 25 meters per second, it will cross a bridge 200 meters long in

• 5 seconds

• 10 seconds

• 20 seconds

• 20 seconds

The denominator of a fraction is greater than its numerator by 11. If 8 is added to both its numerator and denominator, then it becomes ¾. The fraction is

• 25/26

• 35/26

• 26/35

• 26/35

If the ratio of the areas of two squares is 25:36, then the ratio of their perimeters is

• 5:6

• 25:36

• 6:5

• 6:5

If the volume of a sphere is divided by its surface area, we obtain 27 cm. The radius of the sphere is

• 9 cm.

• 81 cm.

• 27 cm.

• 27 cm.

A sum was divided among P, Q & R. R got double than P who got double than Q. If the difference between the shares of Q and R is Rs. 3675.00, then the sum in rupees is

• 4900

• 8575

• 11025

• 11025

The least value of x, for which the expression x2+x+17 will not give a prime number, is

• 7

• 11

• 13

• 13

If 0.06% of a number is 84, then 30% of that number is

• 25.2

• 420

• 42000

• 42000

P sells a table to Q at a profit of 10% and Q sells it to R at a profit of 12%. If R pays Rs.246.40 for it, then how much had P paid for it?

• 200.00

• 300.00

• 248.00

• 248.00