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SSC CHSL Quiz : Quantitative Aptitude | 30-04-2020

Priyanka Mahendras
SSC CHSL Quiz : Quantitative Aptitude | 23 -03-2020





As SSC CHSL notification is out and candidates have started their preparation for this exam. Mahendras also has started special quizzes for this examination. This series of the quizzes are based on the latest pattern of the SSC CHSL examination. Regular practice of the questions included in the quizzes will boost up your preparations and it will be very helpful in scoring good marks in the examination.




Q. 1. A person goes from point L to N and comes back. His average speed for the whole journey is 100 km/hr. If his speed while coming back from N to L is 65 km/hr., then what will be the speed of the person (in km/hr.) while going from L to N? 


рдПрдХ рд╡्рдпрдХ्рддि рдмिंрджु L рд╕े N рддрдХ рдЬाрддा рд╣ै рдФрд░ рд╡ाрдкрд╕ рдЖрддा рд╣ै। рдкूрд░ी рдпाрдд्рд░ा рдХे рд▓िрдП рдЙрдирдХी рдФрд╕рдд рдЧрддि 100 рдХिрдоी / рдШंрдЯा рд╣ै। рдпрджि N рд╕े L рдкрд░ рд╡ाрдкрд╕ рдЖрддे рд╕рдордп рдЙрд╕рдХी рдЧрддि 65 рдХिрдоी / рдШंрдЯा рд╣ै, рддो L рд╕े N рддрдХ рдЬाрддे рд╕рдордп рд╡्рдпрдХ्рддि рдХी рдЧрддि (рдХिрдоी / рдШंрдЯा рдоें) рдХ्рдпा рд╣ोрдЧी?

(A) 135

(B) 146.31

(C) 150.62

(D) 216.67

Q. 2. If u : v : w = 1 : 5 : 13, then what will be the value of (3u + 2v + 4w) / (2w – u – 4v)?

рдпрджि u : v : w = 1 : 5 : 13, рддो (3u + 2v + 4w) / (2w - u - 4v) рдХा рдоाрди рдХ्рдпा рд╣ोрдЧा?

(A) 25

(B) 13

(C) 12

(D) 17

Q. 3. If A = 23 × 54 and B = 22 × 52 then what is the value of A × B?

рдпрджि A = 23 × 54 рдФрд░ B = 22 × 52 рд╣ै рддो A × B рдХा рдоाрди рдХ्рдпा рд╣ै?

(A) 200000

(B) 500000

(C) 40000

(D) 800000

Q. 4. If the price of sugar is increased by 10%, then by how much percent consumption should be reduced so that the expenditure remains the same?

рдпрджि рдЪीрдиी рдХे рдоूрд▓्рдп рдоें 10% рдХी рд╡ृрдж्рдзि рд╣ुрдИ рд╣ै, рддो рдЦрдкрдд рдоें рдХिрддрдиे рдк्рд░рддिрд╢рдд рдХी рдХрдоी рд╣ोрдиी рдЪाрд╣िрдП рддाрдХि рд╡्рдпрдп рд╕рдоाрди рд░рд╣े?

(A) 9.09

(B) 10

(C) 12.5

(D) 20

Q. 5. Two pipes X and Y can fill a cistern in 6 hours and 10 hours respectively. Pipe Z can empty the tank in 4 hours. If all the three pipes are open then in how many hours the cistern will be full?

рджो рдкाрдЗрдк X рдФрд░ Y рдХ्рд░рдорд╢ः 6 рдШंрдЯे рдФрд░ 10 рдШंрдЯे рдоें рдПрдХ рдЯैंрдХ рднрд░ рд╕рдХрддे рд╣ैं। рдкाрдЗрдк Z рдЯैंрдХ рдХो 4 рдШंрдЯे рдоें рдЦाрд▓ी рдХрд░ рд╕рдХрддा рд╣ै। рдпрджि рддीрдиों рдкाрдЗрдк рдЦुрд▓े рд╣ैं рддो рдХिрддрдиे рдШंрдЯे рдоें рдЯैंрдХ рдкूрд░ा рднрд░ рдЬाрдПрдЧा?

(A) 30

(B) 45

(C) 50

(D) 60

Q. 6. What is the value of [(a−2 b3) ÷ (a1 b−1)] × [(a2 b−4) ÷ (a-1 b2)]?

[(a−2 b3) ÷ (a1 b−1)] × [(a2 b−4) ÷ (a-1 b2)] рдХा рдоाрди рдХ्рдпा рд╣ै?

(A) b2

(B) 1/b2

(C) a2

(D) a2b2

Q. 7. B starts some business by investing Rs 90000. After 4 months, D joins business by investing Rs 80000. At the end of the year, in what ratio will they share the profit?

B рдХिрд╕ी рд╡्рдпाрдкाрд░ рдХो 90000 рд░ुрдкрдпे рдХे рдиिрд╡ेрд╢ рд╕े рд╢ुрд░ू рдХрд░рддा рд╣ै। 4 рдорд╣ीрдиे рдХे рдмाрдж, D, 80000 рд░ुрдкрдпे рдХा рдиिрд╡ेрд╢ рдХрд░рдХे рд╡्рдпрд╡рд╕ाрдп рдоें рд╢ाрдоिрд▓ рд╣ोрддा рд╣ै। рд╡рд░्рд╖ рдХे рдЕंрдд рдоें, рд╡े рдХिрд╕ рдЕрдиुрдкाрдд рдоें рд▓ाрдн рдХो рд╕ाрдЭा рдХрд░ेंрдЧे?

(A) 10: 7

(B) 9: 4

(C) 27: 16

(D) 7: 3

Q. 8. A 450 meter long train crosses a bridge 650 meters long in 36 seconds. What is speed (in km/hr.) of the train? 

450 рдоीрдЯрд░ рд▓ंрдмी рдЯ्рд░ेрди 36 рд╕ेрдХंрдб рдоें 650 рдоीрдЯрд░ рд▓ंрдмा рдПрдХ рдкुрд▓ рдкाрд░ рдХрд░рддी рд╣ै। рдЯ्рд░ेрди рдХी рдЧрддि (рдХिрдоी / рдШंрдЯा рдоें) рдХ्рдпा рд╣ै?

(A) 110

(B) 125

(C) 150

(D) 95

Q. 9. The population of a town increases at the rate of 15% per annum. If the present population is 108445 of town, then what was the population 2 years ago?

рдПрдХ рд╢рд╣рд░ рдХी рдЬрдирд╕ंрдЦ्рдпा рдк्рд░рддि рд╡рд░्рд╖ 15% рдХी рджрд░ рд╕े рдмрдв़рддी рд╣ै। рдпрджि рд╢рд╣рд░ рдХी рд╡рд░्рддрдоाрди рдЬрдирд╕ंрдЦ्рдпा 108445 рд╣ै, рддो 2 рд╡рд░्рд╖ рдкрд╣рд▓े рдЖрдмाрджी рдХ्рдпा рдеी?

(A) 72000

(B) 79000

(C) 82000

(D) 85000

Q. 10. The value of cos10o. cos20o. cos30o............... cos180o.

cos10o. cos20o. cos30o............... cos180o рдХा рдоाрди рд╣ै -

(A) 1

(B) 0

(C) – 1

(D) Not defined/рдЕрдкрд░िрднाрд╖िрдд

Answer key:
1. Sol. (D)

Speed of the person from point N to L/ рдмिंрджु N рд╕े L рддрдХ рд╡्рдпрдХ्рддि рдХी рдЧрддि = 65 km/hr. / рдХिрдоी / рдШंрдЯा
Let speed of the first journey/ рдоाрдиा рдкрд╣рд▓ी рдпाрдд्рд░ा рдХी рдЧрддि = s km/hr. / рдХिрдоी / рдШंрдЯा
Since, equal distances are covered, average speed = harmonic mean of both speeds
= 2xy/ (x + y)
рдЪूंрдХि, рд╕рдоाрди рджूрд░ी рдХो рддрдп рдХिрдпा рдЬाрддा рд╣ै, рдФрд╕рдд рдЧрддि = рджोрдиों рдЧрддि рдХा рд╣рд░ाрдд्рдордХ рдоाрдз्рдп = 2xy/ (x + y)
=> [(2 × s × 65)/ (s + 65)] = 100
=> [(130s)/ (s + 65)] = 100
=> 13s = 10s + 650
=> 13s − 10s = 3s = 650
=> s = 650/3 = 216.67
Speed of the person (in km/hr.) while going from L to N/ рд╡्рдпрдХ्рддि рдХी рдЧрддि (рдХिрдоी / рдШंрдЯा рдоें) L рд╕े N рдкрд░ рдЬाрддे рд╕рдордп = 216.67 km/hr. / рдХिрдоी / рдШंрдЯा

2. Sol. (B)

(3u + 2v + 4w)/ (2w – u – 4v) = (3 × 1 + 2 × 5 + 4 × 13)/ (2 × 13 – 1 – 4 × 20)
= 65/5 = 13

3. Sol. (B)
A = 23 × 54 and B = 22 × 52
A × B = 23 × 54 × 22 × 52
= 56 × 25 = 500000

4. Sol. (A)

Originally/ рдоूрд▓рдд:
Price/ рдоूрд▓्рдп: 100 Rs. per kg. Quantity Consumed/ рдЦрдкрдд рдХी рдЧрдпी рдоाрдд्рд░ा: 100 kg.
Total Cost/ рдХुрд▓ рдоूрд▓्рдп = 100 × 100 = Rs.10000
Finally/ рдЕंрддрдд::
Price/ рдоूрд▓्рдп: 110 Rs. per kg. Total Cost/ рдХुрд▓ рдоूрд▓्рдп: 10000
Quantity Consumed/ рдЦрдкрдд рдХी рдЧрдпी рдоाрдд्рд░ा = 10000/110 = 1000/11
Required/рдЕрднीрд╖्рдЯ % = [{100 – (100/11)}/100] × 100 = (1100 – 1000)/11 = 1000/11 = 9.09%

5. Sol. (D)

X 6 10
Y 10 60 6
Z 4 15
According to the question/ рдк्рд░рд╢्рдиाрдиुрд╕ाрд░,
Part of the tank filled in 1 hour/1 рдШंрдЯे рдоें рднрд░ा рдЧрдпा рдЯंрдХी рдХा рднाрдЧ = 10 + 6 – 15 = 1
Required time/ рдЕрднीрд╖्рдЯ рд╕рдордп = 60 ÷ 1 = 60 hours/ рдШंрдЯे

6. Sol. (B)
Expression/ рд╡्рдпंрдЬрдХ: [(a− 2 b3 ) ÷ (a1 b− 1 )] × [(a2 b− 4 ) ÷ (a– 1 b2 )]
= [(a)− 2 − 1 × (b)3 + 1 ] × [(a)2 + 1 × (b) – 4 – 2]
= [(a)− 3 × (b)4 ] × [(a)3 × (b) – 6]
= (a)−3 + 3 × (b)4 − 6
= (a)0 × (b)− 2 = (b)− 2
= 1/b2

7. Sol. (C)

B invested Rs. 90,000 for 12 months and D invested Rs. 80,000 for 8 months.
B рдиे 90,000 рд░ु. 12 рдорд╣ीрдиे рдХे рд▓िрдП рдФрд░ D рдиे 8 рдорд╣ीрдиे рдХे рд▓िрдП 80,000 рд░ु. рдиिрд╡ेрд╢ рдХिрдпा ।
Ratio of profits of B: D/ B: D рдХे рд▓ाрдн рдХा рдЕрдиुрдкाрдд = (12 × 90, 000): (8 × 80, 000)
= 108: 64
At the end of the year, they will share the profit in the ratio = 27: 16
рд╡рд░्рд╖ рдХे рдЕंрдд рдоें, рд╡े рдЕрдиुрдкाрдд = 27: 16 рдоें рд▓ाрдн рд╕ाрдЭा рдХрд░ेंрдЧे ।

8. Sol. (A)
Length of train/ рдЯ्рд░ेрди рдХी рд▓ंрдмाрдИ = 450 m/ рдоी.
and length of bridge/ рдФрд░ рдкुрд▓ рдХी рд▓ंрдмाрдИ = 650 m/ рдоी.
Time taken/ рд▓िрдпा рдЧрдпा рд╕рдордп = 36 seconds/ рд╕ेрдХेрдг्рдб
=> Speed/ рдЧрддि = Distance/ рджूрд░ी / time/ рд╕рдордп
= [(450 + 650)/ 36]
= 1100/36 = 275/9 m/s / рдоी. / рд╕े.
= (275/9) × (18/5) km/hr. = 55 × 2 = 110 km/hr. / рдХिрдоी / рдШंрдЯा

9. Sol. (C)
Let population 2 years ago/2 рд╡рд░्рд╖ рдкрд╣рд▓े рдЬрдирд╕ंрдЦ्рдпा = 100x
Population after 1st year increasing by 15%/1 рд╡рд░्рд╖ рдХे рдмाрдж рдЬрдирд╕ंрдЦ्рдпा рдоें 15% рдХी рд╡ृрдж्рдзि
= 100x × (115/100) = 115x
Population after 2nd year/2 рд╡рд░्рд╖ рдХे рдмाрдж рдЬрдирд╕ंрдЦ्рдпा = 115x × (115/100) = 132.25x
According to question/ рдк्рд░рд╢्рдиाрдиुрд╕ाрд░,
=> 132.25x = 108445
x = 108445/132.25 = 820
Population 2 years ago/2 рд╡рд░्рд╖ рдкрд╣рд▓े рдЬрдирд╕ंрдЦ्рдпा = 100 × 820 = 82000



10. Sol. (B)

Since/ рдЪूँрдХि, cos90o = 0
Given product/ рджिрдпा рдЧुрдгрдирдлрд▓ = 0

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