December 2012

A sweet affair!


During Diwali, a fair was organised near my house. One of the chief attractions at the fair was a contest.

In this contest, four kinds of sweets - a "laddoo", a "barfi", a "gulab jamoon" and a "pedha" - were placed on a table in full view of the participants. A curtain was then dropped blocking the participants' view and the sweets were rearranged, and inverted cups were placed over each of them. The curtain was raised.

The participants had to correctly guess as to which sweet lay covered by which cup. Those who guessed all the four correctly were awarded prizes. And, yes, the names of the sweets are displayed on a black-board as well so that participants do not forget which sweets they had been shown.

In one such contest, 50 children participated. When the cups were removed to reveal the sweets, it turned out that 32 of them had not been able to identify even a single sweet correctly. Eight children had made one correct guess while getting the remaining three wrong, while six had correctly identified two sweets and got the remaining two wrong.

The question is: Can you tell me as to how many children made only three correct guesses and how many of them got all the four right?

Click here for the solution

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  • Birla Institute of Technology, Ranchi -
  • Central Institute of Fisheries Nautical and Engineering Training -
  • Indian Institute of Information Technology, Allahabad (Deemed University) -
  • Central Marine Fisheries Research Institute, Kochi -
  • Tata Institute of Social Sciences, Mumbai -

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