HP Papers: Sample Questions 4 - 5 of 5

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Question number: 4

» Aptitude

Short Answer Question▾

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What is the sum of numbers between 1 to 100 divisible by 2 and 5?

Explanation

  • We are asked to find the sum of numbers between 1 to 100 which are divisible by 2 and 5.
  • LCM of 2 and 5 is 10.
  • So, we have to find the numbers which are divisible by 10.
  • Divisible by 10 numbers are 10,20,30,40,50,60,70,80,90 and 100.
  • These are total n = 10 numbers.
  • Sum of all these numbers is,

Where, a = first term of the series, 10

n = total number of terms in the series, 10

d = common difference between two terms of series, 10

So,

  • Sum of all the numbers between 1 to 100 which are divisible by 2 and 5 is 550.

Question number: 5

» Aptitude

Short Answer Question▾

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The age of man is 32 years then 8 years ago what was the age of man?

Explanation

  • Present age of man is 32 years.
  • We are asked to find his age 8 years ago.
  • This can be derived by subtracting 8 from present age.
  • So, 8 years ago his age will be, years.