11.

A stream of ants go from point A to point B and return to point A along the same path all the ants move at a constant speed and from any given point 2 ants pass per second one way. It takes 1 minute for an ant to go from A to B. How many returning ants will an ant meet in its journey from A to B?

• 120

• 60

• 240

• 180

The capacity of the conical vessel shown above is V. it is filled with water up to half its height. The volume of water in the vessel is

• $\frac{\mathrm{v}}{8}$

• $\frac{\mathrm{v}}{16}$

A large tank filled with water is to be emptied by removing half of the water present in it every day. After how many days will there be closet to 10% water left in the tank?

• One

• Two 

• Three

• Four

N is a natural number. If n⁵ is odd, which of the following is true?

(A) n is odd

(B) n³ is odd

(C) n⁴ is even

• A only

• B only

• C only

• A and B only

Suppose you expand the product (x₁ + y₁)(x₂ + y₂)…..(x₂₀ + y₂₀). How many terms will have only one x and rest y’s?

• 1

• 5

• 10

• 20

In the figure below the number of the circle in the blank rows must be.

• 12 and 20

• 13 and 20

• 13 and 21

• 10 and 11

If we plot the weight (w) versus age (t) of a child in a graph, the one that will never be obtained from amongst the four graphs given below is

Find the missing number.

• 1

• 0

• 2

• 3

In solving a quadratic equation of the form x² + ax + b = 0, one student took the wrong value of a and got the roots as 6 and 2: while another student took the wrong value of b and got the roots as 6 and 1. What are the correct values of a and b, respectively?

• 7 and 12

• 3 and 4

• -7 and 12 

• 8 and 12

The distance between two oil rigs is 6 km. What will be the distance between these rigs in maps of 1:50000 and 1:5000 scales, respectively?

• 12cm and 1.2 cm

• 2 cm and 12 cm

• 120 cm and 12 cm

• 12 cm and 120 cm