EASY
UPSC CDS
IMPORTANT
Earn 100

If H is the harmonic mean between P and Q then the value of HP+HQ is :

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Important Questions on UPSC CDS (II) Previous Year Paper 2018

EASY
UPSC CDS
IMPORTANT
The sum of all possible products taken two at a time out of the numbers ±1, ±2, ±3, ±4 is:
MEDIUM
UPSC CDS
IMPORTANT
The remainder when 3x3- 2x2y13xy2+10y3 is divided by (x  2y) is equal to
MEDIUM
UPSC CDS
IMPORTANT

If ab+bc+ca=0, then the value of

b2-acc2-ab+a2-bcc2-ab+b2-aca2-bca2-bcc2-abb2-acis

MEDIUM
UPSC CDS
IMPORTANT
What is the principal amount which earns ₹210 as compound interest for the second year at 5% per annum?
EASY
UPSC CDS
IMPORTANT
In an examination, 50% of the candidates failed in English, 40% failed in Hindi and 15% failed in both the subjects. The percentage of candidates who passed in both English and Hindi is:
EASY
UPSC CDS
IMPORTANT
A train 100 m long passes a platform 100 m long in 10 seconds. The speed of the train is:
EASY
UPSC CDS
IMPORTANT
A cyclist covers his first 20 km at an average speed of 40 kmph, another 10 km at an average speed of 10 kmph, and the last 30 km at an average speed of 40 kmph. Then the average speed of entire journey is:
MEDIUM
UPSC CDS
IMPORTANT
In a race of 1000 m, A beats B by 150 m. while in another race of 3000 m, C beats D by 400 m, Speed of B is equal to that of D. (Assume that A, B, C and D run with unifrom speed in all the events). If A and C participate in a race of 6000 m, then which one of the following is correct?