Tuesday, December 29, 2009

TESTfunda - CAT Question of the Day 29-Dec-09

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CAT Question of the Day
We have a radioactive substance which decays according to the rule that the decay rate at any instant of time is proportional to the amount of substance left. If 1/4th of the substance disappears after 10 days, then approximately how much time (in days) will it take for half the substance to disappear?

Use:  ln (3/4) = −0.29 and ln (1/2) = −0.693
 1)20 days
 2)24 days
 3)18 days
 4)30 days
Tip of the Day
Use this time to get prepared for the next round of selection – GD & PI. Brush up on newsmakers of the last six months and keep yourself updated with current affairs.
Last year's Question of the day (29-Dec-08)
In the question, a word has been used in sentences in five different ways. Choose the option corresponding to the sentence in which the usage of the word is incorrect or inappropriate.

 1)It adds insult at injury that after this carnage, the terrorists got away because of lackadaisical policing.
 2)Sania missed the season due to a spate of injuries delaying her return to action.
 3)Warm ups before exercising can help prevent injury later.
 4)The footballer had to pull out of the match through injury.
 5)While he nurses his injuries, his sister plays, blissfully unaware of the turmoil she would create in a short while.
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