Best cbse schools in kolkata


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224

February 13, 2023

Digestion In Human beings


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1724

July 21, 2022

When some metal cubes, with edges of 2 cm each, were dropped into the tank, the water level increased by 4 cm. Find the number of cubes in the tank


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1828

January 31, 2021

Maths class 9 cbse


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3481

December 24, 2020

Are the bonds in each of the following substances ionic, nonpolar covalent, or polar covalent? Arrange the substances with polar covalent bonds in order of increasing bond polarity:


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3547

May 29, 2020

Factorise: 250(ab)^3+2


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990

June 19, 2019

Prove (a+b+c)^3  a^3  b^3  c^3 = 3(a+b) (b+c) (c+a)


1

1051

June 19, 2019

If a+b+c = 0, then prove that (b+c)^2 / 3bc + (c+a)^2 / 3ca + (a+b)^2 / 3ab = 1


1

2351

June 18, 2019

If a+b = 12 and ab= 27, find the value of a^3+b^3


1

1930

June 18, 2019

If A,B,C are all non zero and A+B+C = 0 Prove that A2/BC + B2/CA + C2/AB = 3


1

1553

June 18, 2019

Prove that (a+b+c)3 –a^3b^3c63= 3(a+b)(b+c)(c+a)


1

744

June 18, 2019

Factorise: x^3 + 13x^2 + 32x + 20


1

539

June 18, 2019

Represent root 5 on number line


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1242

June 18, 2019

If a+b+c=5,and ab+bc+ca=10,prove a^3+b^3+c^33abc=25


1

1376

June 17, 2019

Prove that (a+b+c)whole cube  a cube b cube  c cube = 3(a+b)(b+c)(c+a )


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10534

June 17, 2019

The blood groups of 30 students of class VIII are recorded


1

934

April 12, 2019

Eleven bags of wheat flour, each marked 5 kg, actually contained the following weights of flour


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978

April 12, 2019

Activity : Ask all the students in your class to write a 3digit number


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1388

April 10, 2019

Activity: Note the frequency of twowheelers, threewheelers and fourwheelers going past


1

1043

April 10, 2019

The distance (in km) of 40 engineers from their residence to their place of work were found


1

481

April 10, 2019

To know the opinion of the students about the subject statistics, a survey of 200 students


1

876

April 10, 2019

A teacher wanted to analyse the performance of two sections of students in a mathematics test


1

1236

April 10, 2019

An organisation selected 2400 families at random and surveyed them to determine


1

1153

April 10, 2019

Three coins are tossed simultaneously 200 times with the following frequencies


1

743

April 10, 2019

In a particular section of class IX, 40 students were asked about the month of their birth


1

749

April 10, 2019

1500 families with 2 children were selected randomly, and the following data were recorded


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1460

April 10, 2019

In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays


1

956

April 10, 2019

Give one example of a situation in which (i) the mean is an appropriate measure of central tendency


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564

April 10, 2019

Find the mean salary of 60 workers of a factory from the following table


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1210

April 10, 2019

Find the mode of 14, 25,14, 28,18,17,18,14, 23, 22,14 and 18


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1089

April 10, 2019
