Interview Q&A / Aptitude
Aptitude interview questions
Quantitative shortcuts for placement tests: percentages, time and work, and more.
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- A student needs 40% to pass. She scores 178 marks and fails by 22 marks. What are the maximum marks?
500. Pass marks = 178 + 22 = 200, and 200 is 40% of the maximum, so maximum = 200 / 0.40 = 500.
BeginnerQuick answer1 min read - In an election between two candidates, 20% of the 8,000 votes cast were invalid. The winner got 55% of the valid votes. How many valid votes did the loser get?
2,880. Valid votes = 80% of 8,000 = 6,400. The loser got 100% - 55% = 45% of valid votes: 0.45 x 6,400 = 2,880. The winning margin is 10% of 6,400 = 640.
BeginnerQuick answer1 min read - A bag has ₹1, 50-paise and 25-paise coins in the ratio 5 : 6 : 8, worth ₹210 in total. How many coins of each kind are there?
105 one-rupee, 126 fifty-paise and 168 twenty-five-paise coins. Take counts 5x, 6x, 8x. Their value is 5x + 3x + 2x = 10x rupees = 210, so x = 21.
IntermediateQuick answer1 min read