Interview Q&A / Aptitude
Aptitude interview questions
Quantitative shortcuts for placement tests: percentages, time and work, and more.
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- Find the greatest number that divides 43, 91 and 183 leaving the same remainder in each case.
The answer is 4. If a number leaves the same remainder for all three, it divides their differences exactly: 48, 92 and 140. HCF(48, 92, 140) = 4, and indeed each number leaves remainder 3 when divided by 4.
IntermediateQuick answer1 min read - What is the largest square tile that can pave a floor 15 m 17 cm long and 9 m 2 cm wide, and how many such tiles are needed?
Convert to centimetres: 1517 and 902. HCF(1517, 902) = 41, so the largest tile is 41 cm by 41 cm. Tiles needed = (1517/41) x (902/41) = 37 x 22 = 814.
IntermediateQuick answer1 min read