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Test common knowledge about social culture P2

Please read my IQ knowledge and multiple choice questions below. The set of questions covers many topics about life and science. Please consult.
  1. Question 1. The inventor of a mobile phone
    1. Alexander Graham Bell
    2. Martin Cooper
    3. John Mitchell
    Martin Cooper is considered the father of a mobile phone and was launched in 1973
  2. Question 2. You need to drain a tank with 3 discharge valves at the bottom, 2 valves with a diameter of 10cm, 1 valve with a diameter of 20cm, how to discharge water faster in the following ways?
    1. Discharge 2 valves with 10cm diameter
    2. Discharge 1 valve with 20cm diameter
    Discharge 1 valve with 20cm diameter. The area of ​​the circle πR˄2, so the valve with the diameter of 20 cm twice as large as the other 2 valves combined, should discharge faster
  3. Question 3. You said Copernicus was famous in any field
    1. Painting
    2. Math
    3. astronomy
    4. Physical
  4. Question 4. Which temple is the symbol of eternal love?
    1. Tal Manal
    2. Ramanathaswamy
    3. Mahabodhi
  5. Question 5. There are 1000 contestants entering Chemistry, University of Science, enrollment target is 100. Has a successful candidate passed at least how many candidates?
    1. 900
    2. 800
    3. 700
  6. Question 6. Which chemicals are commonly used as natural rubber latex antifreeze?
    1. Ammonia
    2. Potassium
    3. Salt
  7. Question 7. Which vitamins are soluble in grease?
    1. Vitamin A
    2. Vitamin B1
    3. Vitamin C
    4. Vitamin B12
  8. Question 8. How many times is the number of rounds of a long watch's dial?
    1. 23
    2. 24
    3. 25
    4. 26
  9. Question 9. In 1 calendar year, how many months have 30 days?
    1. first
    2. 2
    3. 3
    4. 4
  10. Question 10. What is the national title in Le Loi's reign?
    1. Au Lac
    2. Dai Viet
    3. Dai Co Viet
    4. Dai Nam
  11. Question 11. What is the first work of musician Trinh Cong Son?
    1. Please be as happy as ever
    2. Yellow flowers a few degrees
    3. Wet Mi
    4. Peach pink lips
  12. Question 12. What is the weather forecast on VTV often dividing our country into areas?
    1. 7
    2. 8
    3. 9
    4. ten
  13. Question 13. What happens when astronomy occurs between the Sun and Earth?
    1. eclipse
    2. lunar eclipse
    3. Full moon eclipse
  14. Question 14. Which planet is closest to the Sun?
    1. Mars
    2. Mercury
    3. Venus
  15. Question 15. Which planet is closest to Earth?
    1. Venus
    2. Mars
    3. Saturn
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