571 . 36 identical chairs must be arranged in rows with equal number of chairs in each row. Each row must be contain at least 3 chairs & there must be at least 3 rows. How many different arrangements are possible?
  • A. 2
  • B. 4
  • C. 5
  • D. 6
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572 . 36 men can complete a piece of work in 18 days. In how many days will 27 men complete the same work?
  • A. 12
  • B. 22
  • C. 18
  • D. 24
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573 . 3640 ÷ 14 × 16 +340 = ?
  • A. 0.70
  • B. 3525
  • C. 4500
  • D. None of these
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574 . 4% of which number is 20?
  • A. 400
  • B. 500
  • C. 700
  • D. 450
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575 . 40% of 200 is what percent of 160?
  • A. 100
  • B. 80
  • C. 60
  • D. 50
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576 . 48.95-32 .006 =?
  • A. 16.089
  • B. 16.35
  • C. 16.944
  • D. 16.89
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577 . 48.95-32.006 = ?
  • A. 16.089
  • B. 16.35
  • C. 16.89
  • D. 16.944
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578 . 4x4 +25x2 +36=?
  • A. (x + 2)(x - 2)(2x + 3)(2x - 3)
  • B. (2x + 1)(2x - 1)(2 + 6)(x - 6)
  • C. (x + 3)(x - 3)(2x + 2)(2x - 2)
  • D. (x + 2)(2x - 3)(2x + 3)(3x + 2)
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579 . 5% of which number is 25?
  • A. 5
  • B. 250
  • C. 500
  • D. None of these
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580 . 5.125/2.223 =?
  • A. 2.053
  • B. 2.305
  • C. 2.501
  • D. 2.522
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581 . 5 years ago the ratio of father's age to son's age was 5 : 1 and 2 years later father's age will be 3 times his son's age. What is the ratio of their present age?
  • A. 5 : 2
  • B. 7 : 3
  • C. 10 : 3
  • D. 11 : 7
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582 . 50% of a% of b is 75% of b% of C. Which of the following is C ?
  • A. 1.5b
  • B. 0.667a
  • C. 0.5a
  • D. 1.25a
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583 . 50% of the people in an area read Ittefaq and 60% of the people in that area read Prothom Alo. 20% people read both the newspapers. What percent of people do not read any of the newspapers?
  • A. 20
  • B. 10
  • C. 15
  • D. 25
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584 . 50 girls and 100 boys were invited to a party. If 30% of the girls and 75% of the boys attend the party, what percentage of guests attended?
  • A. 55
  • B. 60
  • C. 65
  • D. 75
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585 . 50 men took a dip in a water tank 40m long and 20m broad on a religious day. If the average displacement of water by a man is 4 m3 , then the rise in the water level in the tank will be --
  • A. 25 cm
  • B. 30 cm
  • C. 35 cm
  • D. 50 cm
  • E. None of these
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