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RRB NTPC Data Sufficiency — practice questions

Explore 46 free Data Sufficiency questions in RRB NTPC Reasoning. Open each question or exercise to read its content, reference answers and available explanation.

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Data Sufficiency questions and exercises with answers

Showing questions 1–30 of 46.

What is x? I: 2x + 3 = 11. II: x is an even number.Read the answer and worked solution →Find y. I: y is a prime number. II: y lies between 10 and 14.Read the answer and worked solution →Find x and y. I: x + y = 10. II: x - y = 2.Read the answer and worked solution →Is n even? I: n + 1 is odd. II: n is a multiple of 3.Read the answer and worked solution →Find the number. I: It has two digits. II: Its digits add up to 5.Read the answer and worked solution →A rectangle's area? I: Length is 8 cm. II: Perimeter is 28 cm.Read the answer and worked solution →How old is Ravi? I: He is 4 years older than Sita. II: Sita is 12.Read the answer and worked solution →Is a number divisible by 6? I: It is divisible by 2. II: It is divisible by 3.Read the answer and worked solution →Find a train's speed. I: It covers 120 km. II: It takes 2 hours.Read the answer and worked solution →What day is today? I: Tomorrow is Thursday. II: Yesterday was Tuesday.Read the answer and worked solution →Is x positive? I: x squared is greater than 0. II: x cubed is greater than 0.Read the answer and worked solution →How many boys are in a class? I: There are 40 students. II: Girls number 15.Read the answer and worked solution →Is Priya taller than Meena? I: Meena is taller than Rina. II: Rina is taller than Priya.Read the answer and worked solution →Find an article's cost price. I: It sold for Rs 600. II: Profit was 20%.Read the answer and worked solution →Find a. I: a squared equals 16. II: a is negative.Read the answer and worked solution →Does y = mx + c pass through the origin? I: c = 0. II: m = 2.Read the answer and worked solution →Is a triangle right-angled? I: Sides are 5, 12, 13. II: Perimeter is 30.Read the answer and worked solution →How long does A alone take? I: A and B together take 6 days. II: B alone takes 10 days.Read the answer and worked solution →Average of three numbers? I: Their sum is 45. II: One of them is 20.Read the answer and worked solution →Is the integer p a multiple of 5? I: p ends in digit 5. II: p is odd.Read the answer and worked solution →How is 'sky' coded? I: 'sky blue' is 'ab cd'. II: 'blue' is 'cd'.Read the answer and worked solution →Where is B from A? I: B is 5 m north of C. II: C is 5 m north of A.Read the answer and worked solution →Who is tallest of A, B, C? I: A is taller than B. II: C is shorter than B.Read the answer and worked solution →Is a quadrilateral a square? I: All sides are equal. II: All angles are right angles.Read the answer and worked solution →Find the HCF of two numbers. I: Their product is 360. II: Their LCM is 60.Read the answer and worked solution →Is N prime? I: N is odd. II: N has exactly two factors.Read the answer and worked solution →Can a circle's area be found? I: Diameter is 14 cm. II: Circumference is 44 cm.Read the answer and worked solution →A train's length? I: It crosses a pole in 10 s. II: Its speed is 36 km/h.Read the answer and worked solution →Does ax + b = 0 have exactly one solution? I: a = 3. II: b = 0.Read the answer and worked solution →Is the sum of two numbers even? I: Both are odd. II: Their product is odd.Read the answer and worked solution →

Worked practice questions

What is x? I: 2x + 3 = 11. II: x is an even number.

  1. Both together needed
  2. Neither, even together
  3. I alone suffices
  4. II alone suffices
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Correct answer: C. I alone suffices

Statement I gives 2x = 8 so x = 4; an even number alone leaves many values.

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Find y. I: y is a prime number. II: y lies between 10 and 14.

  1. II alone suffices
  2. Both together needed
  3. Neither, even together
  4. I alone suffices
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Correct answer: C. Neither, even together

Both 11 and 13 are prime and lie between 10 and 14, so y is still not fixed.

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Find x and y. I: x + y = 10. II: x - y = 2.

  1. I alone suffices
  2. Neither, even together
  3. II alone suffices
  4. Both together needed
Show answer and solution

Correct answer: D. Both together needed

Two independent equations in two unknowns give x = 6 and y = 4 only when used together.

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More Reasoning topics

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