SSC CGL Undated PYQs

Question 1

What is the equation of the line perpendicular to the line 5x + 3y = 6 and having Y-intercept -3?

Accepted Answer

The slope of 5x + 3y = 6 is -5/3. A perpendicular line has slope 3/5. With y-intercept -3, the equation is y = (3/5)x - 3, which simplifies to 3x - 5y = 15.

Question 2

In the following question, a sentence has been given in Active/Passive voice. Out of four alternatives suggested, select the one which best expresses the same sentence in Passive/Active voice. I hope that I shall win this dance competition.

Accepted Answer

The original sentence has a main clause 'I hope' and a subordinate clause 'that I shall win this dance competition'. In passive voice, 'I hope' becomes 'It is hoped' and the subordinate clause is transformed appropriately.

Question 3

______________ means that the Supreme Court will reconsider the case and the legal issues involved in it.

Accepted Answer

Appellate jurisdiction allows the Supreme Court to hear appeals against judgments of lower courts, meaning it reconsiders the case and its legal issues.

Question 4

Improve the bracketed part of the sentence. Rohan was upset and so (picked up) his food while his cousins ate heartily.

Accepted Answer

The phrasal verb 'picked at' means to eat only small amounts of food without enthusiasm, which fits Rohan's upset state. The other options do not convey this meaning.

Question 5

At what temperature (in Fahrenheit) pure water freezes?

Accepted Answer

Pure water freezes at 0 degrees Celsius. To convert to Fahrenheit, use the formula F = (C × 9/5) + 32. Thus, 0°C equals exactly 32°F.

Question 6

_______ optical data storage is a technology where data is stored in multiple layers in the optical disc.

Accepted Answer

3D optical data storage allows data to be recorded and read in three dimensions (multiple layers) within an optical disc, significantly increasing its storage capacity.

Question 7

Which of the following is responsible for giving colour to human skin?

Accepted Answer

Melanin is a biological pigment produced by melanocytes in the skin. It determines the color of human skin, hair, and eyes, and protects against UV radiation.

Question 8

The ratio of the volume of two cylinders is 7 : 3 and the ratio of their heights is 7 : 9. If the area of the base of the second cylinder is 154 cm2, then what will be the radius (in cm) of the ﬁrst cylinder?

Accepted Answer

Base area ratio A1/A2 = (V1/V2) × (h2/h1) = (7/3) × (9/7) = 3/1. Since A2 = 154, A1 = 462. Thus, πr² = 462, giving r² = 147, so r = 7√3.

Question 9

The weights of 4 boxes are 40, 70, 80 and 50 kilograms.Which of the following cannot be the total weight,in kilograms, of any combination of these boxes and in a combination a box can be used only once?

Accepted Answer

The total weight of all boxes is 240 kg. Combinations include 40+70+50=160 kg and 70+80+50=200 kg. No combination adds up to 220 kg, making it the correct answer.

Question 10

__________ (HHDD) is a technology where the conventional disk drive is combined with non-volatile flash memory, of typically 128 MB or more to cache data during normal use. 9/7/2017 Staff Selection Commision

Accepted Answer

HHDD stands for Hybrid Hard Disk Drive. It combines a traditional magnetic hard drive with solid-state flash memory to improve overall performance, caching, and boot speeds.

Question 11

What is the sum of the ﬁrst 13 terms of an arithmetic progression if the 5th term is 1 and the 8th term is -17?

Accepted Answer

Find common difference (d) and first term (a). a+4d=1 and a+7d=-17 gives d=-6, a=25. Sum of 13 terms = 13/2 * [2(25) + 12(-6)] = 13 * (-11) = -143.

Question 12

What is the ratio of tigers in sanctuaries E and F to that of tigers in sanctuaries D and C?

Accepted Answer

Find the total number of tigers in sanctuaries E and F, then find the total for D and C. Divide the first sum by the second to get the required ratio 7:3.

Question 13

Select the related letters from the given alternatives. WVT : SRP :: MLJ : ? WVT : SRP :: MLJ : ?

Accepted Answer

Each letter in the first term is shifted backward by 4 positions to get the second term. Applying the same to MLJ: M-4=I, L-4=H, J-4=F, giving IHF.

Question 14

Aman and Kapil starts from Delhi and Gwalior respectively towards each other at same time. They meet at Mathura and then take 196 minutes and 225 minutes respectively to reach Gwalior and Delhi. If speed of Aman is 30 km/hr, then what is the speed (in km/hr) of Kapil?

Accepted Answer

Use the formula S1/S2 = √(t2/t1). Here, 30/S2 = √(225/196) = 15/14. Solving this gives S2 = (30 × 14) / 15 = 28 km/hr.

Question 15

Select the related number from the given alternatives. 357 : 714 :: 468 : ? 357 : 714 :: 468 : ?

Accepted Answer

The pattern involves multiplying the first number by 2. Since 357 × 2 = 714, applying the same logic gives 468 × 2 = 936.

Question 16

The longitudinal valley lying between lesser Himalaya and the ____________ are known as Duns.

Accepted Answer

Duns are longitudinal valleys formed between the Lesser Himalayas and the Shiwalik range. Dehradun, Kotli Dun, and Patli Dun are prominent examples of these formations.

Question 17

If the amount received at the end of 2nd and 3rd year as Compound Interest on a certain Principal is Rs 2100, and Rs 2268 respectively, what is the rate (in %) of interest?

Accepted Answer

The difference between the amounts for consecutive years is the interest on the previous year's amount. Interest = 2268 - 2100 = 168. Rate = (168/2100) × 100 = 8%.

Question 18

Which of the following region is covered by tropical evergreen forest?

Accepted Answer

Tropical evergreen forests require heavy rainfall (over 200 cm). The western slopes of the Western Ghats receive abundant monsoon rain, making them ideal for these dense forests.

Question 19

The Red fort in Delhi was the residence of emperors of which dynasty in the 16th century?

Accepted Answer

The Red Fort was built by the Mughal Emperor Shah Jahan. It served as the main residence of the Mughal emperors for nearly 200 years until 1857.

Question 20

_________ is the largest phylum of Animalia which includes insects.

Accepted Answer

Arthropoda is the largest phylum in the animal kingdom. It includes insects, spiders, and crustaceans, which are characterized by jointed appendages and a hard exoskeleton.