CDS (II) 2017 · Elementary Mathematics
A full Elementary Mathematics paper in the UPSC CDS pattern: 100 questions in 2 hours, with a third of the question's marks deducted for every wrong answer. Arithmetic, algebra, trigonometry, geometry, mensuration and statistics at Class 10 level, against the clock.
100questions
100marks
2 hoursno calculator
36/48/16easy / medium / hard
Topics in this paper
Mathematics · 100 questions
- HCF and LCM5
- Number system5
- Heights and distances5
- Triangles5
- Percentage4
- Time and work4
- Time, speed and distance4
- Trigonometric identities4
- Circles4
- Profit and loss3
- Quadratic equations3
- Linear equations3
- Complementary angles3
- Mean3
Sample question from this paper
HCF and LCM · medium
The greatest number that divides 245 and 1029 leaving remainder 5 in each case is
- A. 8
- B. 20
- C. 16
- D. 32
Show answer and solution
Answer: C
The divisor must divide and , so it is their HCF. and , giving HCF . It must also exceed 5, which 16 does. Trap: using HCF(245, 1029) directly gives 7, which is wrong.
The divisor must divide and , so it is their HCF. and , giving HCF . It must also exceed 5, which 16 does. Trap: using HCF(245, 1029) directly gives 7, which is wrong.