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Maths class 9 cbse
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1
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203
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September 29, 2020
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Are the bonds in each of the following substances ionic, non-polar covalent, or polar covalent? Arrange the substances with polar covalent bonds in order of increasing bond polarity:
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1
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931
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May 29, 2020
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Factorise: 250(a-b)^3+2
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2
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176
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June 19, 2019
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Prove (a+b+c)^3 - a^3 - b^3 - c^3 = 3(a+b) (b+c) (c+a)
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2
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103
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June 19, 2019
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If a+b+c = 0, then prove that (b+c)^2 / 3bc + (c+a)^2 / 3ca + (a+b)^2 / 3ab = 1
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2
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472
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June 18, 2019
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If a+b = 12 and ab= 27, find the value of a^3+b^3
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2
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136
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June 18, 2019
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If A,B,C are all non zero and A+B+C = 0 Prove that A2/BC + B2/CA + C2/AB = 3
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2
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234
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June 18, 2019
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Prove that (a+b+c)3 –a^3-b^3-c63= 3(a+b)(b+c)(c+a)
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2
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189
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June 18, 2019
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Factorise: x^3 + 13x^2 + 32x + 20
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2
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90
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June 18, 2019
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Represent root 5 on number line
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2
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384
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June 18, 2019
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If a+b+c=5,and ab+bc+ca=10,prove a^3+b^3+c^3-3abc=-25
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2
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364
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June 17, 2019
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Prove that (a+b+c)whole cube - a cube -b cube - c cube = 3(a+b)(b+c)(c+a )
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2
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3489
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June 17, 2019
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The blood groups of 30 students of class VIII are recorded
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2
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174
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April 12, 2019
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Eleven bags of wheat flour, each marked 5 kg, actually contained the following weights of flour
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2
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268
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April 12, 2019
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Activity : Ask all the students in your class to write a 3-digit number
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2
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458
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April 10, 2019
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Activity: Note the frequency of two-wheelers, three-wheelers and four-wheelers going past
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2
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402
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April 10, 2019
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The distance (in km) of 40 engineers from their residence to their place of work were found
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2
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112
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April 10, 2019
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To know the opinion of the students about the subject statistics, a survey of 200 students
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2
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165
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April 10, 2019
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A teacher wanted to analyse the performance of two sections of students in a mathematics test
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2
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299
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April 10, 2019
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An organisation selected 2400 families at random and surveyed them to determine
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2
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326
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April 10, 2019
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Three coins are tossed simultaneously 200 times with the following frequencies
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2
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422
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April 10, 2019
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In a particular section of class IX, 40 students were asked about the month of their birth
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2
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235
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April 10, 2019
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1500 families with 2 children were selected randomly, and the following data were recorded
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2
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429
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April 10, 2019
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In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays
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2
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160
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April 10, 2019
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Give one example of a situation in which (i) the mean is an appropriate measure of central tendency
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2
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284
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April 10, 2019
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Find the mean salary of 60 workers of a factory from the following table
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2
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386
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April 10, 2019
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Find the mode of 14, 25,14, 28,18,17,18,14, 23, 22,14 and 18
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2
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329
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April 10, 2019
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The following observations have been arranged in ascending order
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2
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264
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April 10, 2019
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In a mathematics test given to 15 students, the following marks (out of 100) are recorded
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2
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354
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April 10, 2019
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The following number of goals were scored by a team in a series of 10 matches
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2
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444
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April 10, 2019
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