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
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
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
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
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
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
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
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
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
30. AIDS is caused by
(A) helminth
(B) bacteria
(c) fungus
(D) virus
(E) None of the above/More than one of the above
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
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
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
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
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
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 =
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
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
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
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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