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IMPORTANT
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Which one of the following equations does not have real roots?

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Important Questions on UPSC CDS (II) Previous Year Paper 2021

EASY
UPSC CDS
IMPORTANT
UPSC CDS Previous Year Papers>Chapter 10 - UPSC CDS (II) Previous Year Paper 2021>Elementary Mathematics>Q 10
The sum and product of roots of a quadratic equation are 7 and 12 respectively. If the bigger root is halved and a smaller root is doubled, then what is the resulting quadratic equation?
EASY
UPSC CDS
IMPORTANT
UPSC CDS Previous Year Papers>Chapter 10 - UPSC CDS (II) Previous Year Paper 2021>Elementary Mathematics>Q 11
For which values of k, does the equation x2-kx+2=0 have real and distinct solutions?
EASY
UPSC CDS
IMPORTANT
UPSC CDS Previous Year Papers>Chapter 10 - UPSC CDS (II) Previous Year Paper 2021>Elementary Mathematics>Q 12
If α+β+γ=αβ+βγ+γα, then what is 1-α1-β1-γ equal to?
EASY
UPSC CDS
IMPORTANT
UPSC CDS Previous Year Papers>Chapter 10 - UPSC CDS (II) Previous Year Paper 2021>Elementary Mathematics>Q 13
If log10x+log10x2=2log10x+1, then what is the value of x?
EASY
UPSC CDS
IMPORTANT
UPSC CDS Previous Year Papers>Chapter 10 - UPSC CDS (II) Previous Year Paper 2021>Elementary Mathematics>Q 14
The LCM of two prime numbers p and q is 2231, where p>q. What is the value of p-q?
EASY
UPSC CDS
IMPORTANT
UPSC CDS Previous Year Papers>Chapter 10 - UPSC CDS (II) Previous Year Paper 2021>Elementary Mathematics>Q 15
Three runners are running in a circular track, and they complete one round in 20, 30 and 35 minutes respectively. When will they next meet at starting point?
EASY
UPSC CDS
IMPORTANT
UPSC CDS Previous Year Papers>Chapter 10 - UPSC CDS (II) Previous Year Paper 2021>Elementary Mathematics>Q 16
5 pencils, 6 notebooks and 7 erasers cost ₹250, whereas 6 pencils, 4 notebooks and 2 erasers cost ₹180. What is the cost of 2 notebooks and 4 erasers?
EASY
UPSC CDS
IMPORTANT
UPSC CDS Previous Year Papers>Chapter 10 - UPSC CDS (II) Previous Year Paper 2021>Elementary Mathematics>Q 17
How many zeros are there in the product 150×249×348×.........×501?