Manesh has to secure 40% of the marks to pass in an exam. He scored 40 marks and is declared to be failed by 40 marks. What is the total or the maximum marks he can score in the exam? Answer: 200 marks
A milkmaid adds 4 litres of water to 2 litres of milk before distribution. By mistake she added 2 litres water to 4 litres of milk. How much more water has she to add to rectify her mistake? Answer: Six litres. Water should be double than the milk content. the present content is 4 litres. Hence, the total water should be 8. it has 2 litres already. So, another 6 litres are to be added.
Exactly how many minutes is it before eight o'clock if 40 minutes ago, it was three times as many minutes past four o'clock? Answer: 50 minutes. Between four o'clock and eight o'clock we have 240 minutes. In these 240 minutes we have 4 lots of the unknown time (t) and 40 minutes. Therefore 240 = 4 x t + 40. Therefore t = 50 minutes.
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