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IIFT Number System — practice questions — page 3

Explore 104 free Number System questions in IIFT Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Number System questions and exercises with answers

Showing questions 61–90 of 104.

With first term 6 and common difference 3, the first four terms are:Read the answer and worked solution →When the common difference is zero, as in 2, 2, 2, 2, the list is:Read the answer and worked solution →Gauss found the sum of the whole numbers from 1 to 100 to be:Read the answer and worked solution →The sum of the first n terms of a progression can be written as n by 2 times:Read the answer and worked solution →The sum of the first 22 terms of the list 8, 3, minus 2 is:Read the answer and worked solution →If the last term of a finite progression is l, the sum of all its terms is n by 2 times:Read the answer and worked solution →The sum of the first 1000 positive integers is:Read the answer and worked solution →If a, b and c are in a progression, then b equals:Read the answer and worked solution →A well costs 150 rupees for the first metre and rises by 50 for each further metre. The cost for the fourth metre is:Read the answer and worked solution →Catch the progressionsRead the answer and worked solution →Pop the progression wordsRead the answer and worked solution →Run the progression gatesRead the answer and worked solution →Slice the progression wordsRead the answer and worked solution →Progression or notRead the answer and worked solution →Sort term, sum and meanRead the answer and worked solution →Type the numberRead the answer and worked solution →Progressions bingoRead the answer and worked solution →An equation p(x) = 0 where p is a polynomial of degree 2 is called a:Read the answer and worked solution →The scholar credited with deriving the quadratic formula around 1025 CE was:Read the answer and worked solution →The expression b squared minus 4ac is called the equation's:Read the answer and worked solution →If that expression is greater than zero, the equation has:Read the answer and worked solution →If that expression equals zero, the equation has:Read the answer and worked solution →If that expression is less than zero, the equation has:Read the answer and worked solution →For the equation 2x squared minus 5x plus 3 equals 0, the discriminant is:Read the answer and worked solution →Because that discriminant is positive, the equation 2x squared minus 5x plus 3 equals 0 has:Read the answer and worked solution →The roots of 2x squared minus 5x plus 3 equals 0 are:Read the answer and worked solution →For the equation 6x squared minus x minus 2 equals 0, the discriminant is:Read the answer and worked solution →The roots of 6x squared minus x minus 2 equals 0 are:Read the answer and worked solution →For the equation x squared plus 4x minus 5 equals 0, the discriminant is:Read the answer and worked solution →The roots of x squared plus 4x minus 5 equals 0 are:Read the answer and worked solution →

Worked practice questions

With first term 6 and common difference 3, the first four terms are:

  1. 3, 6, 9, 12
  2. 6, 12, 18, 24
  3. 6, 9, 12, 15
  4. 6, 3, 0, minus 3
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Correct answer: C. 6, 9, 12, 15

1. Start at 6. 2. Add 3 each time. 3. The terms are 6, 9, 12, 15. _Source: syllabus Mathematics, Chapter 5, Arithmetic Progressions._

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When the common difference is zero, as in 2, 2, 2, 2, the list is:

  1. Never a progression
  2. A pure fraction
  3. A prime series
  4. Still a progression
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Correct answer: D. Still a progression

1. The fixed number added is zero. 2. The difference may be positive, negative or zero. 3. It is still an arithmetic progression. _Source: syllabus Mathematics, Chapter 5, Arithmetic Progressions._

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Gauss found the sum of the whole numbers from 1 to 100 to be:

  1. 5050
  2. 5500
  3. 1000
  4. 10000
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Correct answer: A. 5050

1. He paired the list with its reverse. 2. That gives 100 pairs each summing to 101. 3. The sum is 5050. _Source: syllabus Mathematics, Chapter 5, Arithmetic Progressions._

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