Table of Contents
Ans. (c)
Explanation:
The given A.P. is
1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39
Thus, a = 1, d = 2 and n = 20
We know that,
katex is not defined
Ans. (b)
Explanation:
Multiples of 4 lying between 10 and 250 are 12 , 16, 20, 24……, 248
Here, a = 12, d = 16 - 12 = 4, katex is not defined = 248
katex is not defined = a + (n - 1)d
⇒ 248 = 12 + (n - 1)× 4
⇒ 248 - 12 = 4(n - 1)
⇒ katex is not defined = n – 1
⇒ n - 1 = 59
∴ n = 59 + 1 = 60
Explanation:
We have,
katex is not defined
∴ common difference = 6
Explanation:
Given, A.P. is 20, katex is not defined
28th term will be the first negative term of given A.P.
Explanation:
Given, the houses in a row numbered consecutively from 1 to 49.
Now, sum of numbers preceding the number X
Hence, at X = 35, sum of number of houses preceding the house no. X is equal to the sum of the number of houses following X.
Chapter No. | Chapter Name |
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Chapter 1 | Real Numbers |
Chapter 2 | Polynomials |
Chapter 3 | Pair of Linear Equations in Two Variable |
Chapter 4 | Quadratic Equations |
Chapter 5 | Arithmetic Progressions |
Chapter 6 | Triangles |
Chapter 7 | Coordinate Geometry |
Chapter 8 | Introduction to Trigonometry |
Chapter 9 | Some Applications of Trigonometry |
Chapter 10 | Circles |
Chapter 11 | Areas Related to Circle |
Chapter 12 | Surface Areas and Volumes |
Chapter 13 | Statistics |
Chapter 14 | Probability |
Chapter Wise Important Questions for CBSE Board Class 10 Maths |
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Real Numbers |
Polynomials |
Pair of Linear Equations in Two Variables |
Quadratic Equations |
Arithmetic Progressions |
Triangles |
Coordinate Geometry |
Introduction to Trigonometry |
Some Applications of Trigonometry |
Circles |
Areas Related to Circles |
Surface Areas and Volumes |
Statistics |
Probability |
CBSE Important Questions Class 10
ICSE Important Questions Class 10
CBSE Important Questions Class 10
ICSE Important Questions Class 10