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)?