Math MCQs with answers Page - 7

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Q. The average of five numbers is 42 while the average of another eight numbers is 81 what is the combined average of all numbers together?

  • (A) 60.5
  • (B) 66
  • (C) 65
  • (D) 68.5

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Q. The average of first five multiple of 3 is

  • (A) 3
  • (B) 5
  • (C) 9
  • (D) 3.3

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Q. Ram bought 2 articles for rupees 5.50 each, 3 articles for rupees 3.50, 3 articles for rupees 5.50 each and 5 articles for 1.5 rs each the average price of one article is

  • (A) Rs 3
  • (B) Rs 3.10
  • (C) Rs 3.50
  • (D) Rs 2

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Q. By what least number, 3600 be divided to get a perfect cube?

  • (A) 9
  • (B) 50
  • (C) 300
  • (D) 450

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Q. By what least number, 675 be multiplied to obtain a number which is perfect cube?

  • (A) 5
  • (B) 6
  • (C) 7
  • (D) 8

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Q. The largest 4 digit number which is a perfect cube is

  • (A) 9999
  • (B) 9261
  • (C) 8000
  • (D) None of these

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Q. The cube root of 1.728 is

  • (A) 2.4
  • (B) 1.5
  • (C) 1.2
  • (D) 2.5

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Q. If average of given numbers 3, 5, 6, 7, 9, x is 7, then find the value of x

  • (A) 12
  • (B) 5
  • (C) 8
  • (D) 19

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Q. The average of marks secured by 35 students is 72. If the marks secured by one student was written as 36 instead of 86, then find the correct average?

  • (A) 74
  • (B) 73.4
  • (C) 75.6
  • (D) 71.8

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Q. The average weight of 8 persons increased by 1.5 kg when a person weighing 65 kg is replaced by a new person, what could be the weight of new person?

  • (A) 69 kg
  • (B) 79 kg
  • (C) 77 kg
  • (D) 78 kg

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