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1995 · Q134Science & TechnologyLogical Reasoning & Puzzlesmoderate

In the given diagram, circle A represents teachers who can teach Physics, circle B represents teachers who can teach Chemistry and circle C represents those who can teach Mathematics. Among the regions marked p, q, r, s, t, u and v, the one which represents teachers who can teach Physics and Mathematics but not Chemistry, is

  1. (a)v
  2. (b)u
  3. (c)s
  4. (d)t
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Official answer(b) u

2010 · Q80Science & TechnologyLogical Reasoning & Puzzlesmoderate

Half of the villagers of a certain village have their own houses. One-fifth of the villagers cultivate paddy. One-third of the villagers are literate. Four-fifth of the villagers are below twenty-five. Then, which one of the following is certainly true?

  1. (a)All the villagers who have their own houses are literate
  2. (b)Some villagers under twenty-five are literate
  3. (c)A quarter of the villagers who have their own houses cultivate paddy
  4. (d)Half of the villagers who cultivate paddy are literate
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Official answer(b) Some villagers under twenty-five are literate