# Mathematics Online Test

Which of these numbers is rational?

For the equation px2 + px + q = 0, the value of the discriminant is zero. The roots of this equation are:

If the diameter of a wire is increased by 10%, by how

much per cent approximately, will its length be decreased, if

the volume remains the same?

The sum of two times one natural number and three

times another natural number is less than 24. If the first natural

number is less than or equal to eight, the highest value of the

second natural number is:

A shopkeeper bought 800 kg rice at Rs 3840. He had

to sell it at a loss of as much as he received for 16 kg. The

selling price (per kg, in Rs) will be:

In how many ways can we arrange 6 books on

different subjects, in a shelf?

There are 7 points in a plane, no three of them being

collinear. The number of triangles formed by using these points is

Which of the following numbers is a perfect square?

What is the maximum value of the function

f(x) = x2 + 5x + 16

Prasoon’s bike needs a fresh paint. He wants 2 shades

on his bike. The painter shows all the available 5 shades. In

how many ways can Prasoon paint his bike?

Mr Mohit is 7 times as old as his son. 10 years hence

he will be 3 times as old as his son. What are their present

ages (in years)?

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If the diameter of a wire is increased by 10%, by how much per cent approximately, will its length be decreased, if the volume remains the same?

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