Important Mathematics Questions for DSSSB 2020 : 16th January 2020

Maths Questions

Practice Mathematics Questions for DSSSB Exam 

Dear Students!!! There is most general as well as a scoring section in all the competitive entrance examinations in the teaching field i.e Mathematics“.Because in this section only one thing is work i.e your accuracy and that could be nourished with the daily practice. With a proper system, Study Notes, Quizzes, Vocabulary one can quiet his/her nerves and exceed expectations in the blink of an eye. So, for this, we are providing you the daily quiz for all teaching exams i.e TET Exam 2020, DSSSBKVSSTET Exam

Q2. Among four children with monthly pocket money (in ₹) 1500, 1600, 1800, 2000 how many will have pocket money less than the average of 4 children?
मासिक पॉकेट मनी 1500, 1600, 1800, 2000 वाले चार बच्चों में से कितने बच्चों के पास 4 बच्चों के औसत से कम पॉकेट मनी होगी?
(a) 3
(b) 4
(c) 2
(d) 1

Q3. A number when multiplied by 15 is increased by 210. The number is
एक संख्या को जब 15 से गुणा किया जाता है तो उसमें 210 की वृद्धि होती है. संख्या है
(a) 10
(b) 15
(c) 20
(d) 14

Q4. The different between the age of two person is 20 and one fourth of their age’s sum is equal to 16. Find the age of younger person?
दो व्यक्तियों की आयु के बीच का अंतर 20 है और उनकी आयु के एक चौथाई का योग 16 के बराबर है. कम आयु वाले व्यक्ति का पता लगाएं?
(a) 22
(b) 42
(c) 40
(d) 20

Q5. The sum of 4 boys born at the Interval of 4 years each is 60 years. What is the age of eldest boy?
प्रत्येक 4 वर्ष के अंतराल में जन्म लेने वाले 4 लड़कों की आयु का योग 60 वर्ष है. सबसे बड़े लड़के की आयु क्या है? 
(a) 21
(b) 22
(c) 40
(d) 20

Q6. The Radius of three concentric circles are in ratio 2:3:4. Find the ratio of the area between the Inner most and outer most circle to that between the two outer circles?
तीन संकेंद्रित वृत्तों के त्रिज्या 2: 3: 4 के अनुपात में हैं. दो बाहरी वृतों के बीच सबसे आंतरिक और सबसे बाहरी वृत के बीच के क्षेत्रफल का अनुपात ज्ञात करें?
(a) 10:12
(b) 7:12
(c) 12:7
(d) 12:10

Q7. How many iron pipes each of length 14 m and Diameter 4 cm can be made out of 1.76 cubic metre of Iron?
1.76 घन मीटर लोहे से कितने लोहे के पाइप बनाए जा सकते हैं जिनमें से प्रत्येक की लंबाई 14 मीटर और व्यास 4 सेमी है?
(a) 120
(b) 400
(c) 100
(d) All of these/ उपरोक्त सभी

Q8. What is the square of the sum of digits of a number which when divided by 68 leaves the remainder 55 and when divided 85 leaves the remainder 72, when divided by 119 leaves the remainder 106?
किसी संख्या के अंको के योग का वर्ग क्या होगा जो 68 से विभाजित होने पर 55 शेषफल छोड़ता है और 85 से विभाजित होने पर 72 शेषफल छोड़ता है, और 119 से विभाजित होने पर 106 शेषफल छोड़ता है?
(a) 120
(b) 400
(c) 100
(d) 324

Q9. Simplify, [(2.6×4)÷1]-[(2.4×6)÷2]+[(2.2×8)÷4]
सरलीकरण करें, [(2.6×4)÷1]-[(2.4×6)÷2]+[(2.2×8)÷4]
(a) 7.6
(b) 7.2
(c) 7
(d) 1

Solutions

S3. Ans.(b)
Sol. Let the number = x
15x= x+210
14x= 210
x= 15

S5. Ans.(a)
Sol. x+(x+4)+(x+8)+(x+12)= 60
4x+24= 60
4x= 36
X= 9
eldest boy’s age = x+12
= 9+12
= 21

S8. Ans.(d)
Sol. 68-55= 13, 85-72= 13 and 119-106= 13
LCM of 68, 85, 119 = 2380
= 2380-13
= 2367
The square of the sum of digits of 2367
= (2+3+6+7)²
= (18)²
= 324

S9. Ans.(a)
Sol. [(2.6×4)÷1]-[(2.4×6)÷2]+[(2.2×8)÷4]
= (10.4÷1)-(14.4÷2)+(17.6÷4)
= 10.4-7.2+4.4
= 14.8-7.2
= 7.6


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