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SSC CPO Paper I 2020 · Shift 3

SSC CPO Paper I 23 Nov 2020 Shift 3 – Question Paper

200 questions · 200 marks · 120 minutes · +1 for a correct answer, −0.25 for a wrong one. Free PDF with answer key.

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Paper pattern

SectionQuestionsMarks
General Intelligence and Reasoning5050
General Knowledge and General Awareness5050
Quantitative Aptitude5050
English Comprehension5050

Sample questions from this paper

Q1.
If ‘A’ denotes ‘addition’, ‘B’ denotes ‘multiplication’, ‘C’ denotes ‘subtraction’, and ‘D’ denotes ‘division’, then what will be the value of the following expression?
74 A (31 B 2) B 2 C (68 C 4) D (4 B 2) = ?
यदि ‘A’ का अर्थ ‘जोड़’, ‘B’ का अर्थ ‘गुणा’, ‘C’ का अर्थ ‘घटाव’ और ‘D’ का अर्थ ‘भाग’ है, तो निम्नलिखित व्यंजक का मान क्या होगा?
74 A (31 B 2) B 2 C (68 C 4) D (4 B 2) = ?
  1. A188
  2. B190
  3. C98
  4. D160
Show answer

Concept: Replace each letter by its operation, then use BODMAS (brackets, division/multiplication, addition/subtraction).

  1. Expression becomes 74+(31×2)×2−(68−4)÷(4×2).
  2. Brackets: 31×2=62, 68−4=64, 4×2=8.
  3. 74+62×2−64÷8=74+124−8.
  4. =190.

Trick: Solve brackets first, then ÷ and ×, last + and −.

Answer: (B) 190

अवधारणा: हर अक्षर को उसके चिह्न से बदलें, फिर BODMAS (कोष्ठक, भाग/गुणा, जोड़/घटाव) लगाएँ।

  1. व्यंजक: 74+(31×2)×2−(68−4)÷(4×2)।
  2. कोष्ठक: 31×2=62, 68−4=64, 4×2=8।
  3. 74+62×2−64÷8=74+124−8।
  4. =190।

ट्रिक: पहले कोष्ठक, फिर ÷, × और अंत में +, −।

उत्तर: (B) 190

SSC CPO Paper IGeneral Intelligence and ReasoningMathematical Operations
Q51.
What is the chemical symbol of Arsenic?
आर्सेनिक (Arsenic) का रासायनिक प्रतीक क्या है?
  1. AAc
  2. BAn
  3. CAs
  4. DAr
Show answer

Concept: Chemical symbols are one or two letters, usually from the English or Latin name of the element.

  1. Arsenic (atomic number 33) is a metalloid of Group 15; its symbol is As.
  2. Ac = Actinium, Ar = Argon; 'An' is not the symbol of any element.

Yaad rakhein: Ar-se-nic → first two letters As; do not confuse with Ar (Argon).

Answer: (C) As

अवधारणा: रासायनिक प्रतीक तत्व के अंग्रेज़ी या लैटिन नाम के एक या दो अक्षर होते हैं।

  1. आर्सेनिक (Arsenic, परमाणु क्रमांक 33) समूह 15 का उपधातु (metalloid) है; इसका प्रतीक As है।
  2. Ac = एक्टिनियम, Ar = आर्गन; 'An' किसी तत्व का प्रतीक नहीं है।

याद रखें: Ar-se-nic → पहले दो अक्षर As; Ar (आर्गन) से भ्रमित न हों।

उत्तर: (C) As

SSC CPO Paper IGeneral Knowledge and General AwarenessChemical Symbols
Q101.
If the area of a square is decreased by 19%, then the diagonal of the square is decreased by:
यदि किसी वर्ग के क्षेत्रफल में 19% की कमी की जाती है, तो वर्ग के विकर्ण में कितनी कमी होगी?
  1. A10%
  2. B15%
  3. C5%
  4. D12%
Show answer

Concept: Area of a square =d22, so area ∝d2 and d∝Area.

  1. New area =100%−19%=81% of old area.
  2. New diagonal =0.81=0.9 times old diagonal.
  3. Decrease =1−0.9=0.1=10%.

Trick: Area factor 0.81=(0.9)2, so every length (side, diagonal) falls by 10%.

Answer: (A) 10%

अवधारणा: वर्ग का क्षेत्रफल =d22, अतः क्षेत्रफल ∝d2 और d∝क्षेत्रफल।

  1. नया क्षेत्रफल =100%−19%=81%।
  2. नया विकर्ण =0.81=0.9 गुना।
  3. कमी =1−0.9=0.1=10%।

ट्रिक: 0.81=(0.9)2, इसलिए हर लंबाई (भुजा, विकर्ण) 10% घटती है।

उत्तर: (A) 10%

SSC CPO Paper IQuantitative AptitudePercentage – Area and Diagonal
Q151.
Identify the segment in the sentence which contains a grammatical error.
Do you earn so much to make both ends meet?
  1. Amake both
  2. BDo you earn
  3. Cends meet
  4. Dso much to
Show answer

Concept: To show that something is sufficient for a purpose we use adjective/adverb + enough + to-infinitive, not 'so much to'.

  1. 'So much' needs a result clause with that (so much that …) or 'as to'; 'so much to make' is incorrect.
  2. The idea is sufficiency: earning sufficient money to meet expenses.
  3. Correct sentence: Do you earn enough to make both ends meet?
  4. 'Do you earn', 'make both', 'ends meet' are correct (idiom: make both ends meet = manage expenses).

Trick: Sufficient for a purpose → enough to; result → so … that.

Answer: (D) so much to

अवधारणा: किसी काम के लिए 'पर्याप्त' बताने हेतु enough + to-infinitive आता है, 'so much to' नहीं।

  1. 'So much' के साथ परिणाम बताने के लिए that (so much that …) या 'as to' चाहिए; 'so much to make' गलत है।
  2. यहाँ भाव 'पर्याप्त कमाई' का है।
  3. सही वाक्य: Do you earn enough to make both ends meet?
  4. 'make both ends meet' = खर्च चला पाना – यह मुहावरा सही है।

ट्रिक: उद्देश्य के लिए पर्याप्त → enough to; परिणाम → so … that।

उत्तर: (D) so much to

SSC CPO Paper IEnglish ComprehensionError Spotting – 'enough to'

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