In the formula,

for finding the mean of the grouped data, the d_i ’s are the deviations from A of 

In what ratio does the y-axis divide the join of P(-4, 2) and Q(8, 3)?

How many bags of grain can be stored in a cuboidal granary (8m × 6m × 3m), if each bag occupies a space of 0.64m³?

If the zeros of the quadratic polynomial ax²+bx+c, c≠0 are equal, then

A quadratic polynomial, the sum of whose zeroes is 0 and one zero is 3, is:

If three coins are tossed simultaneously, then the probability of getting at least two heads, is:

The diameter of a wheel is 63 cm. Distance traveled by the wheel in 100 revolutions is:

119²-11² is a

Two A.P. 's have the same common difference. The first term of one of these is 8 and that of the other is 3. The difference between their 30th term is:

What is the 20th term from the end of the AP 3, 8, 13, ..., 253?

A pair of linear equations which has a unique solution x = 2, y = -3 is:

The area of the base of a rectangular tank is 6500 cm² and the volume of water contained in it is 2.6 m³. The depth of water in the tank is

If the zeros of the quadratic polynomial x²+(a+1)x+b are 2 and -3, then

The tops of two towers of heights x and y, standing on a level ground, subtend angles of 30° and 60° respectively at the center of the line joining their feet. Then, x: y is

In the given figure the measure of ∠D and ∠F are respectively:

In the following circuits (Figure), heat produced in the resistor or combination of resistors connected to a 12V battery will be:

A rectangular wooden block has length, breadth, and height of 50 cm, 25 cm and 10cm, respectively. This wooden block is kept on the ground in three different ways, turn by turn. Which of the following is the correct statement about the pressure exerted by this block on the ground?

An object of mass 2kg is sliding with a constant velocity of 4ms^-1 on a frictionless horizontal table. The force required to keep the object moving with the same velocity is:

If we release a magnet held in our hand, it falls to the ground. The force which makes the magnet fall down is an example of:

 Refractive indices of water, sulphuric acid, glass and carbon disulphide are 1.33, 1.43, 1.53 and 1.63 respectively. the light travels slowest in:

In an electrical circuit two resistors of 2Ω and 4Ω respectively are connected in series to a 6V battery. The heat dissipated by the 4Ω resistor in 5s will be:

The resistivity does not change if:

A truck carries sand. Due to a hole in the base of the truck, a significant amount of sand falls continuously. For the same condition of working of the engine, the speed of the truck should:

A uniform magnetic field exists in the plane of paper pointing from left to right as shown in figure. In the field an electron and a proton move as shown. The electron and the proton experience.

 One of the following does not apply to a concave mirror. This is:

An electric heater is rated at 2kW. Electrical energy costs Rs 4 per kWh. What is the cost of using the heater for 3 hours?

Gravitational force between two objects is 10N. If masses of both objects are doubled without changing distance between them, then the gravitational force would become:

The angle between an incident ray and the plane mirror is 30°. The total angle between the incident ray and reflected ray will be:

An electric fuse works on the

When three identical bulbs of 60 W- 220V rating are connected in series to a 220V supply, the power drawn by them will be.

Which of the statements about the reaction,

ZnO + CO → Zn + CO₂ is correct?

The electronic configuration of Rb(37) will be

Zinc reacts with silver nitrate to form which compounds?

Which of the following represent mercury (I) ion correctly ?

The charge/mass ratio of electron

Which of the following is the purest form of carbon?

The self linkage property (catenation) is maximum in

Which of the following statements about the given reaction are correct?
3Fe(s) + 4H₂O(g) → Fe₃O₄(g) + 6H₂(g)

(i) Iron metal is getting oxidised
(ii) Water is getting reduced
(iii) Water is acting as reducing agent
(iv) Water is acting as an oxidising agent

A solution of NaCl

(i) will turn red litmus blue
(ii) will turn pH paper green
(iii) will turn blue litmus red
(iv) will not affect litmus

If we keep cold drink bottle in freezer, what will happen?

18 g of water is electrolysed. The weight of oxygen formed will be

Which of the following is ethanol?

CaOCl₂ will liberate Cl₂ gas in presence of

(i) CO₂
(ii) HCl
(iii) CO
(iv) NO

An aqueous solution with pH = 1 is

Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g. hydrogen. After the formation of four bonds, carbon attains the electronic configuration of

1.12.91 is the first Sunday. Which is the fourth Tuesday of December 91?

What comes in place of the question mark (?) in the following letter series? PMK, MPK, MKP, KMP ?

Study the given relationship and complete the following analogies from the two sets of options given.

Square is to (i), as Circle is to (ii)

(i) [A] Rectangle [B] Cube [C] Cuboid [O] Triangle
(ii) [W] Ellipse [X] Ellipsoid [Y] Sphere [X] Line

If 1st October is Sunday, then 15 November will be

The figure given below shows the map of the path between Richard's house and his shop. Study the map and answer the following question:

Here, the circular park is given whose radius is 1 km. In which direction his shop lies with respect to park?

Choose the best alternative 6 : 18 :: 4 : ?

(2 tan 30°)/(1+tan²30°) is equal to:

Study the following information carefully to answer the question.

1. 'A $ B' means 'A is the mother of B'.
2. 'A # B’ means 'A is the father of B'.
3. 'A @ B' means 'A is the husband of B'.
4. 'A % B' means 'A is the daughter of B'.

If F@D%K#H, then how is F related to H?

If '+' means '-', '÷' means '+', '-' means '×' and '×' means '÷', then which of the following

equation is correct?

Directions:

Read the following information carefully & answer the question. Among  A, B, C, D and E. E is taller than D but not as fat as D. C is taller than A but shorter than B. A is fatter  than D but not as fat as B. E is thinner than C who is thinner than D. E is shorter than A. who is the thinnest person?

Satish remembers that his brother's birthday is after fifteenth but before eighteenth of February whereas his sister Kajal remembers that her brother's birthday is after sixteenth but before nineteenth of February. On which day in February is Satish's brother's birthday?

In the following question, one number is wrong in the series. Find out the number. 385, 462, 572, 396, 427, 671, 264

If Kunal says, "John's mother is the only daughter of my mother." how is Kunal related to John?

Pointing to a man a woman said: "his mother is the only daughter of my mother." how is the woman related to the man?

Direction:
(I) A is the son of B
(II) C who is the sister of B has A son D and A daughter E
(III) F is the maternal uncle of D.

How is A related to D?