Practice Question and Answer
8 Q: In a school with 600 students the average age of the boys is 12 years and that of the girl is 11 years. If he average age of the students is 11 years 9 months, then the number of girls in the school is
2426 06022727ead295556282ad20f
6022727ead295556282ad20f- 1150true
- 2250false
- 3350false
- 4450false
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Answer : 1. "150"
Q: What is the heaviest noble gas? 2426 05b5cc69ce4d2b4197774c820
5b5cc69ce4d2b4197774c820- 1kryptonfalse
- 2radontrue
- 3heliumfalse
- 4xenonfalse
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Answer : 2. "radon"
Explanation :
Answer: B) radon Explanation: The seven elements — helium, neon, argon, krypton, xenon, radon, and oganesson of Group 18 of the periodic table are Noble or Inert gases. Radon is the heaviest and Helium is the lightest gases of the noble gases.
Q: After starting from his house. Naren walked a few meters towards the east. From there, he took a right turn and walked 80m. and then took a left turn and walked 20 m. Finally, he took a right turn again and walked 40 m to reach the hospital . If the air distance between his house and the hospital is 130 m. how far did Naren walk towards the east initially?
2426 05f5b1d424d383e58c6b840d6
5f5b1d424d383e58c6b840d6- 150 mfalse
- 230 mtrue
- 340 mfalse
- 425 mfalse
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Answer : 2. "30 m "
Q: In a Plane there are 37 straight lines, of which 13 pass through the point A and 11 pass through the point B. Besides, no three lines pass through one point, no lines passes through both points A and B , and no two are parallel. Find the number of points of intersection of the straight lines. 2426 05b5cc7d1e4d2b41977751281
5b5cc7d1e4d2b41977751281- 1525false
- 2535true
- 3545false
- 4555false
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Answer : 2. "535"
Explanation :
Answer: B) 535 Explanation: The number of points of intersection of 37 lines is C237. But 13 straight lines out of the given 37 straight lines pass through the same point A. Therefore instead of getting C213 points, we get only one point A. Similarly 11 straight lines out of the given 37 straight lines intersect at point B. Therefore instead of getting C211 points, we get only one point B. Hence the number of intersection points of the lines is C237-C213-C211 +2 = 535
Q: Which of the following points lies on the line 5x + 4y = 2?
2426 05f02b12fe890ce63e579f72b
5f02b12fe890ce63e579f72b- 1(-2,3)true
- 2(2,-3)false
- 3( 2,3 )false
- 4(-2,-3)false
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Answer : 1. "(-2,3) "
Q: A train takes 18 seconds to pass through a platform 162 m long and 15 seconds to pass another platform 120 m long. The length of the train in meter is
2426 05d7f25c27f06bc6981e06d64
5d7f25c27f06bc6981e06d64- 170false
- 280false
- 390true
- 4105false
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Answer : 3. "90"
Q: A shopkeeper marked an article 75% above the cost price and sold it after a discount of 50%. Find the cost price of the article if he had a loss of Rs. 156.
2426 05df9b8349e7c624c9bfe9274
5df9b8349e7c624c9bfe9274- 1Rs. 1200false
- 2Rs. 1240false
- 3Rs. 1250false
- 4Rs. 1248true
- 5Rs. 1270false
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Answer : 4. "Rs. 1248"
Q: What is the following is the softest?
2426 0611b6619dc4e2547a1c91d07
611b6619dc4e2547a1c91d07- 1Alumfalse
- 2Diamondtrue
- 3Terliumfalse
- 4Topazfalse
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