UPSC CDS/OTA

Number system

Mathematics

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Number system

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Questions

30

Time

30 min

Marks

30

Solutions

All inline

Q1Find the HCF of 72 and 108.EasySolve →Q2Find the smallest prime number.EasySolve →Q3Find the LCM of 12 and 18.EasySolve →Q4What is the sum of the first 10 natural numbers?EasySolve →Q5What is the remainder when 345 is divided by 11?MediumSolve →Q6Convert decimal 255 to binary.HardSolve →Q7Find the sum of the first 20 even numbers.HardSolve →Q8Find the HCF of 210 and 45.MediumSolve →Q9If x is divisible by 8 and 12, find the smallest such x greater than 100.HardSolve →Q10The product of two numbers is 180 and their HCF is 6. Find their LCM.HardSolve →

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