Question 1
Real Numbers · 2019
What is the LCM of 6 and 20?
Correct!
The answer is C, 60.
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CBSE X 2019 question paper
Try 10 of the 199 CBSE X 2019 questions on Lakshyank below. Tap an option to see if you are right. Marked here as: +1 correct, no negative marking, 0 skipped.
Question 2
Polynomials · 2019
Given that ±√(5/3) are zeroes of 3x⁴+6x³−2x²−10x−5, what are the other two zeroes?
Correct!
The answer is C, −1 and −1.
Question 3
Quadratic Equations · 2019
A train travels 360 km. Increasing its speed by 5 km/h reduces travel time by 1 hour. Find its original speed.
Correct!
The answer is D, 40 km/h.
Question 4
Pair of Linear Equations in Two Variables · 2019
A train takes 2 hours less if 10 km/h faster and 3 hours more if 10 km/h slower. Find its distance.
Correct!
The answer is C, 600 km.
Question 5
Arithmetic Progressions · 2019
How many three-digit natural numbers are divisible by 11?
Correct!
The answer is C, 81.
Question 6
Quadratic Equations · 2019
For what positive k do both x²+kx+64=0 and x²−8x+k=0 have real roots?
Correct!
The answer is C, 16.
Question 7
Quadratic Equations · 2019
For nonzero a,b with a+b≠0, solve 1/(a+b+x)=1/a+1/b+1/x, with defined denominators.
Correct!
The answer is A, x=−a or x=−b.
Question 8
Quadratic Equations · 2019
Solve (x+1)/(x−1)−(x−1)/(x+1)=5/6, x≠±1.
Correct!
The answer is B, x=5 or x=−1/5.
Question 9
Quadratic Equations · 2019
Solve 13x²+9(x+1)−(2x+3)(x+2)=6.
Correct!
The answer is A, x=(−1±√34)/11.
Question 10
Quadratic Equations · 2019
Solve (x−3)/(x+3)−(x+3)/(x−3)=6 6/7, x≠±3.
Correct!
The answer is A, x=9/4 or x=−4.
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