21. The number of ways in which 12 identical pens can be distributed between two students, if each student is to get at least two pens, is
(A) 8
(B) 9
(C) 10
(D) 11
(E) None of the above/More than one of the above
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22. If the radii of circles A and B are in the ratio 1 : 5 : 1, then the areas of the circles A and B will be in the ratio
(A) 1.5 : 1
(B) 2 : 1
(C) 2.25 : 1
(D) 2.5 : 1
(E) None of the above/More than one of the above
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23. One tap can fill a water tank in 3 hours and another tap can empty it in 4 hours. If the tank is one-third full and both the taps are opened together, then the time taken to fill the tank will be
(A) 8 hours
(B) 9 hours
(C) 10 hours
(D) 11 hours
(E) None of the above/More than one of the above
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24. If x3 – y3 = 117/8 and x – y = 3/2 then the value of x2 + xy + y2 will be
(A) 1
(B) 5/8
(C) 39/4
(D) 39/8
(E) None of the above/More than one of the above
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25. If (5)x2+2x+7=(125)2x+1 then the value of x is
(A) 5
(B) 4
(C) 3
(D) 2
(E) None of the above/More than one of the above
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26. The study of bones is done under the branch of science called
(A) geology
(B) Serology
(C) orology
(D) Osteology
(E) None of the above/More than one of the above
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27. Which of the following does not have any enzyme in its cells?
(A) Lichen
(B) Virus
(C) Bacteria
(D) Algae
(E) None of the above/More than one of the above
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28. In which organ of the human body are the lymphocytes formed?
(A) Liver
(B) Bone marrow
(C) Spleen
(D) Pancreas
(E) None of the above/More than one of the above
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29. Which of the following hormones contains iodine?
(A) Testosterone
(B) Adrenaline
(C) Thyroxine
(D) Insulin
(E) None of the above/More than one of the above
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30. AIDS is caused by
(A) helminth
(B) bacteria
(c) fungus
(D) virus
(E) None of the above/More than one of the above
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31. The unit of pressure is
(A) kg/cm2
(B) kg/cm
(c) kg/mm
(D) kg/cm3
(E) None of the above/More than one of the above
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32. Sound wave in air is
(A) transverse
(B) longitudinal
(C) electromagnetic
(D) polarized
(E) None of the above/More than one of the above
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33. The value of 50 °C in Fahrenheit scale is
(A) 104°F
(B) 122 °F
(C) 100 °F
(D) 75 °F
(E) None of the above/More than one of the above
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34. The sunlight from the sun to the earth reaches in
(A) 5 minutes
(B) 6 minutes
(C) 8 minutes
(D) 10 minutes
(E) None of the above/More than one of the above
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35. Which one of the following is a scalar quantity?
(A) Force
(B) Pressure
(C) Velocity
(D) Acceleration
(E) None of the above/More than one of the above
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36. Which one of the following quantities does not have unit?
(A) Stress
(B) Force
(C) Strain
(D) Pressure
(E) None of the above/More than one of the above =
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37. What is measured in hertz?
(A) Frequency
(B) Energy
(C) Heat
(D) Quality
(E) None of the above/More than one of the above
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38. Body temperature is regulated by
(A) medulla
(B) thalamus
(C) hypothalamus
(D) cerebellum
(E) None of the above/More than one of the above
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39. The device to measure electric current is
(A) voltineter
(B) ammeter
(C) voltameter
(D) potentiometer
(E) None of the above/More than one of the above
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40. Which of the following is also known as laughing gas?
(A) Nitric oxide
(B) Nitrous oxide
(C) Nitrogen pentoxide
(D) Nitrogen
(E) None of the above/More than one of the above
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