Board Paper of Class 10 2019 Maths Delhi(Set 3)  Solutions
General Instructions:
(i) All questions are compulsory.
(ii) The question paper consists of 30 questions divided into four sections – A, B, C and D.
(iii) Section A comprises 6 questions of 1 mark each. Section B contains 6 questions of 2 marks each. Section C contains 10 questions of 3 marks each. Section D contains 8 questions of 4 marks each.
(iv) There is no overall choice. However, an internal choice has been provided in two questions of 1 mark, two questions of 2 marks, four questions of 3 marks each and three questions of 4 marks each. You have to attempt only one of the alternative in all such questions.
(v) Use of calculators is not permitted.
 Question 1
Two positive integers a and b can be written as a = x^{3}y^{2 }and b = xy^{3} . x, y are prime numbers. Find LCM (a, b). VIEW SOLUTION
 Question 2
How many two digits numbers are divisible by 3? VIEW SOLUTION
 Question 3
In Fig. 1, DE  BC, AD = 1 cm and BD = 2 cm. What is the ratio of the ar (Δ ABC) to the ar (Δ ADE)?
VIEW SOLUTION
 Question 4
Find the coordinates of a point A, where AB is diameter of a circle whose centre is (2, –3) and B is the point (1, 4). VIEW SOLUTION
 Question 5
For what value of k, the roots of the equation x^{2} + 4x + k = 0 are real?
OR
Find the value of k for which the roots of the equation 3x^{2} – 10x + k = 0 are reciprocal of each other. VIEW SOLUTION
 Question 6
Find A if tan 2A = cot (A – 24°)
OR
Find the value of (sin^{2 }33° + sin^{2} 57°) VIEW SOLUTION

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