List of practice Questions

A and B can do a work in 120 days, B and C can do it in 72 days while A and C can do it in 90 days. In how many days can C alone do the work?
A man sold two articles for ₹4000 each with no profit no loss in the whole transaction. If he sold one article at a gain of 25%, then the other article has been sold at a loss of:
In a class of 60 students, 60% are boys. The average of marks of the boys is 68 and that of the girls is 72. What are the average marks of the whole class?
If \( a^4 + \frac{1}{a^4} = 322 \), then the value of \( a - \frac{1}{a} \) is:
In an election between two candidates, one of them got 62% of the total votes polled and won by 432 votes. What is the total number of votes polled?
If the difference between 58% and 76% of a number is 198, then the difference between 82% and 46% of the same number will be:
A and B, working together, can do a work in 8 days. If A alone can do the work in 12 days, then in how many days can B alone do 25 percent of the work?
The sum of all possible values of \( K \) such that a 5-digit number 90K68 is divisible by 8 will be:
In a clearance sale, goods were sold at a reduction of 20%. Sarika purchased a saree for ₹984 in the clearance sale. The usual price of the saree was:
Two trains having lengths 680 m and 570 m are running towards each other on parallel tracks with speeds of 80 km/h and 70 km/h, respectively. In how many seconds will they be able to cross each other?
What is the HCF of \( \frac{8}{5}, \frac{6}{8}, \frac{4}{25} \)?
If the mean of the observations 6, 16, \( (K + 26) \), \( (2K - 3) \), and 10 is 14, then the value of \( \frac{K^2 + 1}{2} \) is:
The area of a rectangle having sides in the ratio 1 : 4 is equal to the area of a square of side 8 cm. The perimeter of the rectangle (in cm) is:
The number of positive integers that have at most seven digits and contain only the digits 0 and 9 is
If the length of a chord of a circle is equal to that of radius of the circle, then the angle subtended in radius, at the centre of the circle by the chord is
When n-hexane is heated to 773K at 10-20 atmosphere pressure in the presence of \(Cr_2O_3\), benzene is formed. This reaction is called
A freely suspended needle of a magnetic compass comes to rest along the geographic
The ratio of the velocities of the electron in the second, third and fourth Bohr’s orbits of the hydrogen atom is:
Which of the following is not a measuring function of a multimeter?
The quantum number which determines the shape of the subshell is:
Which Carbon Compound is used as fire extinguisher?
Supersonic Aircrafts discharge the following substance into the stratosphere:
When water is added to anhydrous white copper sulphate, the color will change to:
'Khajuraho' temple was built by:
The macro-nutrient provided by inorganic fertilization are: