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Page 1: Super Session of Math’s 23 Oct. The Gurukul of Math’s...The Gurukul of Math’s By Sahil Sir Join Paid Course: Use Referral SAHIL10 Super Session of Math’s 23 Oct. 2019 Q.1

The Gurukul of Math’s

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Super Session of Math’s 23 Oct. 2019

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Super Session of Math’s 23 Oct. 2019

Q.1. A can do a piece of work in 20 days and B in 15 days.

With help of C, they finish the work in 5 days. C can

alone do the work in:

A किसी िाम िो 20 किन में िर सिता ह ैऔर B 15 किन में िर

सिता ह ैC िी सहायता स े5 वें किन में िाम समाप् त िर ेते ेह। C

अिेेा उस िाम िो कितन ेकिन में िरेगा?

1) 5 days 2) 6 days

3) 10 days 4) 12 days

Q.2. A Spherical lead ball of radius 6 cm is melted and

small lead balls of 3 mm are made. The total number of

possible small lead balls is :

6 सेमी त्रिज् या वाेी ि गोे सीस ेिी ल े िो त्रलाेा िर 3

त्रममी त्रिज् या वाेी टो ी-टोअी सीस ेिी ल े ेलनाई जाती ह ै सीस े

िी टो ी ल ेों िी सभंात्रवत सखं् या ‍ या होगी ?

1) 4250 2) 4000

3) 8005 4) 8000 5) None of these

Q.3. At what percentage above the cost price must an

article be marked so as to gain 33% after allowing a

customer a discount of 5%?

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किसी वस् त ुिे रयमयम‍् य स ेपलर कितन े्रतत्रततत उसिी अकंित िीमत

रखी जा कि ग्राहि िो 5% िी ट् िेन ेिे ्रतश् चात ििुानिार िो

33% िा ेाभ हो ?

1) 40% 2) 45%

3) 35% 4) 47%

Q.4. The four sides of a quadrilateral are in the ratio of 2 :

3 : 4 : 5 and its perimeter is 280m. The length of the

longest side is :

किसी चतभुुजु िी चार भजुा ँ 2 : 3 : 4 : 5 िे अनलुात में ह ैऔर

उसिी लररत्रि 280 मी र ह ै सलस ेेम् ली भजुा िी ेम् लाई लता

?

1) 100 m/100 m 2) 150 m

3) 175 m 4) 180 m

Q.5. Kamal has some apples. He sold 40% more than he

ate. If he sold 70 apples, the how many apples did he eat

?

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िमे िे लास िुट सले ह ै उसन ेत्रजतन ेखा उसस े40% अत्रिि

लचे े यकि उसन े70 सेल लचे ेतो लता िी उसन ेकिसन ेसेल खा

?

1) 18 2) 42

3) 50 4) 90

Q.6. A train 100m long is running at a speed of 120 kms/hr.

The time taken to pass a person standing near the line is

100 मी र ेम् ली ि रेेगाी ी 120 किमी/ा ें िी रफ्तार स ेचे

रही ह ै रेे लथ िे लास खी े ि व् यत्रि िो लार िरन ेमें स ेकितना

समय ेगेगा ?

1) 12 second 2) 3 second

3) 5 second 4) 7 second

Q.7. If 𝒙𝟐 + 𝟓𝒙 + 𝟔 = 𝟎, then the value of 𝟐𝒙

𝒙𝟐−𝟕𝒙 + 𝟔 is :

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यकि 𝒙𝟐 + 𝟓𝒙 + 𝟔 = 𝟎, हो तो 𝟐𝒙

𝒙𝟐−𝟕𝒙 + 𝟔 िा मान लता ं ?

1) 1

6 2)

1

3

3) −1

6 4) −

1

3

Q.8. If a + b = 5 and a – b = 3, then the value of (a² + b²) is

यकि a + b = 5 और a – b = 3 हो तो (a² + b²) िा मान लता

?

1) 17 2) 18

3) 19 d) 20

Q.9. A 8 cm long perpendicular is drawn from the center of

a circle to the 12 cm chord. Find the diameter of the

circle.

किसी वतृ्त िे िेन्‍द र स े12 समेी ेम् ल ेजीवा ति ि 8 समेी ेम् ला

ेम् ल खचचा जाता ह ै वतृ्त िा व् यास ञातात िीत्रज ?

1) 10 cm 2) 12 cm

3) 16 cm 4) 20 cm

Q.10. The point equidistant from the sides of a triangle is

called

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त्रिभजु िी भजुाओं स ेसमिरुस् थ त्रलन्‍द ि ु‍ या िहेात ेह ै?

1) Circumcenter/परिकेन्‍दर् 2) Incentre/ अतं: िेन्‍द र

3) Orthocenter/ लम्ब्केन्‍दर् 4) Centroid / िेन्‍द रि

Q.11. The value of 𝒄𝒐𝒔𝒆𝒄𝟐𝟔𝟎𝟎 + 𝒔𝒆𝒄𝟐𝟔𝟎𝟔𝟎 − 𝒄𝒐𝒕𝟐𝟔𝟎𝟎 +

𝒕𝒂𝒏𝟐𝟑𝟎𝟎 will be

𝒄𝒐𝒔𝒆𝒄𝟐𝟔𝟎𝟎 + 𝒔𝒆𝒄𝟐𝟔𝟎𝟔𝟎 − 𝒄𝒐𝒕𝟐𝟔𝟎𝟎 +

𝒕𝒂𝒏𝟐𝟑𝟎𝟎 िा मान ‍ या होगा ?

1) 5 2) 51

2

3) 51

3 4) 5

2

3

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Q.12. A man buys a table and a chair for Rs. 500. He sells

the table at a loss of 10% and the chair at a gain of 10%.

He still gains Rs. 10 on the whole. The cost price of chair

in rupees is

िोई व् यत्रि ि मजे और ि िुससी ु. 500 में खरीिता ह ै वह मजे

10% िी हात्रन लर और िुससी 10% िे ेाभ लर लचे िेता ह ैकिर भी

उस ेिुे त्रमेािर ु. 10 िा ेाभ होता िुससी िा रयमयम‍् य ु.लयों में

लता ?

1) ₹ 200 2) ₹ 250

3) ₹ 300 4) ₹ 350

Q.13. The least number that must be added to 8961 to make

is exactly divisible by 84 is

8961 में िौन-सी ेातु्तम सखं् या जोी े कि वह 84 स ेलर््तु: त्रवभाज् य

हो जाए?

1) 27 2) 57

3) 141 4) 107

Q.14. The average age of a class of 39 students is 15 years. If

the age of the teacher is included, then the average

increases by 3 months. Fin d the age of the teacher.

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39 टािों िी ि िक्षा में औसत आय ु15 वर् ुह ै यकि अध् यालि िी

आय ुभी जोी िी जा तो औसत आय ु3 माह लढ़ जाती ह ै अध् यालि

िी आय ुञातात कीजजए?

1) 30 2) 25

3) 35 4) 40

Q.15. If 𝒙 = 𝒂 +𝟏

𝒂 and 𝒚 = 𝒂 –

𝟏

𝒂, then the value of 𝒙𝟒 +

𝒀𝟒 − 𝟐𝒙𝟐𝒚𝟒 is

यकि 𝒙 = 𝒂 +𝟏

𝒂 और 𝒚 = 𝒂 –

𝟏

𝒂, हो तो 𝒙𝟒 + 𝒀𝟒 − 𝟐𝒙𝟐𝒚𝟒

िा मान ञातात िरें ?

1) 4 2) 8

3) 16 4) 64

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Q.16. In ∆ABC and ∆DEF, If ∠A = 50°, ∠B = 70°, ∠C = 60°,

∠D = 60°, ∠E =70° and ∠F = 50° then

∆ABC और ∆DEF, में यकि ∠A = 50°, ∠B = 70°, ∠C = 60°,

∠D = 60°, ∠E =70° और ∠F = 50° हो तो

1) ∆ABC~∆FED 2) ∆ABC~∆DFE

3) ∆ABC~∆EDF 4) ∆ABC~∆DEF

Q.17. In a ∆𝐀𝐁𝐂, if 4∠A =3∠B = 12∠C, find ∠A

∆𝐀𝐁𝐂 में यकि 4∠A =3∠B = 12∠C हो तो ∠A माेम् िरें ?

1) 22.5° 2) 90°

3) 67.5° 4) 112.5°

Q.18. if 𝒔𝒊𝒏𝜽 + 𝒄𝒐𝒔𝒆𝒄𝜽 = 𝟐, the value fo 𝒔𝒊𝒏𝒏𝜽 + 𝒄𝒐𝒔𝒆𝒄𝒏𝜽

is

यकि 𝒔𝒊𝒏𝜽 + 𝒄𝒐𝒔𝒆𝒄𝜽 = 𝟐, हो तो 𝒔𝒊𝒏𝒏𝜽 + 𝒄𝒐𝒔𝒆𝒄𝒏𝜽 िा मान

‍ या होगा ?

1) 2𝑛 2) 21

𝑛

3) 2 4) 0

Q.19. If 𝟐𝒙+𝟒 − 𝟐𝒙+𝟐 = 𝟑 then the value of ‘x’ is

यकि 𝟐𝒙+𝟒 − 𝟐𝒙+𝟐 = 𝟑 हो तो ‘x’ िा मान ञातात िीत्रज ?

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1) 0 2) 2

3) -1 4) -2

Q.20. Two persons are on either side of a temple, 75 m high,

observe the angle of elevation of the top of the temple to

be 30° and 60° respectively. The distance between the

persons is :

िो व् यत्रि , ि 75 मी र पँच ेमत्रन्‍दिर िे त्रवलरीत टोरों लर, ि

सीिी रेखा में खी े ह ैऔर मकंिर िे तीर् ुिा उन्‍द नयन िोर् िेखत ेह।

जो ि िो 30° और 60° िस्रे िो ्रततीत होता ह ै िोनों व् यत्रि यों

िे लीच कितनी िर्ी ह ै?

1) 173.2 m 2) 100 m

3) 157.7 m 4) 273.2 m

Q.21. If the difference between compound and simple

interest on a certain sum at the rate of 5% per annum

for 2 years is Rs. 20, then the sum is :

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यकि िोई िन रात्रत 5% वार्र्िु िर लर 2 वर् ुिे त्रे िी जाती ह ै

तो उस लर ेगन ेवाे ेचरयमवतृ्रि ब् याज और सािारर् ब् याज में ₹ 20

िा अन्‍द तर ह,ै तो लता वह रात्रत ‍ या ह ै?

1) ₹ 2000 2) ₹ 4000

3) ₹ 6000 4) ₹ 8000

Q.22. Ratio of A’s age to B’s age is 4 : 3 ‘A’ will be 26 years

old after 6 years. The age of B now is :

A िी आय ुऔर B िी आय ुिा अनलुात 4 : 3 ह ै 6 वर् ुलश् चात A

26 वर् ुिा हो जा गा B िी वतमुान आय ु‍ या ह ै?

1) 9 years 2) 12 years

3) 21 years 4) 15 years

Q.23. If the Arithmetic mean of 7, 85, 13, X and 9 is 10, then

the value of X is :

यकि 7, 5, 13, X तथा 9 िा औसत 10 हो तो X िा मान ‍ या

होगा ?

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1) 10 2) 12

3) 14 4) 16

Q.24. A man sells an article at 15% profit. If he had sold it

for 6 more, he would have gained 18%. The man

bought the article for

ि व् यत्रि किसी वस् त ुिो 15% ेाभ लर लचेता ह ै यकि उसन े स े

6 अत्रिि लर लचेा होता, तो उस े18% िा ेाभ होता व् यत्रि न ेवह

वस् त ुकितन ेु.लय ेमें खरीिी थी ?

1) 100 2) 150

3) 200 4) 250

Q.25. A’s salary was decreased by 50% and subsequently

increased by 50%. How much percent does he lose ?

A का्वतेन्50% घटा्दिया्गया्औि्बाि्में्50% बढा्दिया्गयाा।्उसे्ककतने्प्रततशत्की्हातन्हुई?

1) 25% 2) 50%

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3) 6.25% 4) No loss

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Step

1

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Step

2

Step

3

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Step 4

St

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Solution

1-D 2-D 3-A 4-A 5-C 6-B 7-C 8-A 9-D 10-B

11-C 12-C 13-B 14-B 15-C

16-A 17-C 18-C 19-D 20-A 21-D 22-D 23-D 24-C 25-A