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Question 71

Delhi Police Constable 2025• Numerical Ability• Numerical Ability

A person lends ₹480 at 10% simple interest per annum.

What interest will he earn in 3 years?

  1. AOption (a)

    ₹140

  2. BOption (b)

    ₹160

  3. COption (c)

    ₹150

  4. DOption (d)

    ₹144

View answer & explanation

Correct answer

Answer: (a)A.

₹140

Explanation not yet available.

Question 72

Delhi Police Constable 2025• Numerical Ability• Numerical Ability

Two runners, A and B, run at speeds in the ratio 2:3.

If A covers 200 m in 40 seconds, how long will B take to cover the same distance?

  1. AOption (a)

    ≈ 27 s

  2. BOption (b)

    ≈ 24 s

  3. COption (c)

    ≈ 25 s

  4. DOption (d)

    ≈ 28 s

View answer & explanation

Correct answer

Answer: (a)A.

≈ 27 s

Explanation not yet available.

Question 73

Delhi Police Constable 2025• Numerical Ability• Numerical Ability

What is the LCM of (a²-b²) and (a-b)?

  1. AOption (a)

    (a-b)

  2. BOption (b)

    (a+b)(a-b)

  3. COption (c)

    (a²-b²)

  4. DOption (d)

    (a - b)²

View answer & explanation

Correct answer

Answer: (a)A.

(a-b)

Explanation not yet available.

Question 74

Delhi Police Constable 2025• Numerical Ability• Numerical Ability

What is the smallest number which when increased by 3 is divisible by 27, 35, 25, and 21?

  1. AOption (a)

    4722

  2. BOption (b)

    4725

  3. COption (c)

    4728

  4. DOption (d)

    4719

View answer & explanation

Correct answer

Answer: (a)A.

4722

Explanation not yet available.

Question 75

Delhi Police Constable 2025• Numerical Ability• Numerical Ability

Evaluate: 50 + 60 ÷ (5×2) - 8×3

  1. AOption (a)

    32

  2. BOption (b)

    36

  3. COption (c)

    34

  4. DOption (d)

    42

View answer & explanation

Correct answer

Answer: (a)A.

32

Explanation not yet available.

Question 76

Delhi Police Constable 2025• Numerical Ability• Numerical Ability

A cricket player has an average of 55 runs over 9 matches. If he scores 145 runs in the 10th match, what will be his new average? 

  1. AOption (a)

    63 

  2. BOption (b)

    64

  3. COption (c)

    65

  4. DOption (d)

    66

View answer & explanation

Correct answer

Answer: (a)A.

63 

Explanation not yet available.

Question 77

Delhi Police Constable 2025• Numerical Ability• Numerical Ability

An item is sold after successive discounts of 30% and 10%. What is the equivalent single discount percentage? 

  1. AOption (a)

    36% 

  2. BOption (b)

    37% 

  3. COption (c)

    38% 

  4. DOption (d)

    40%

View answer & explanation

Correct answer

Answer: (a)A.

36% 

Explanation not yet available.

Question 78

Delhi Police Constable 2025• Numerical Ability• Numerical Ability

A circular well of radius 7 m is dug 10 m deep. Find the volume of earth dug out. (π = 22/7)

  1. AOption (a)

    1100 m2

  2. BOption (b)

    2200 m2

  3. COption (c)

    1538 m2

  4. DOption (d)

    1540 m2

View answer & explanation

Correct answer

Answer: (a)A.

1100 m2

Explanation not yet available.

Question 79

Delhi Police Constable 2025• Numerical Ability• Numerical Ability

A boy walks 9 km in 3 hours. Find his speed in km/h. 

  1. AOption (a)

    2 km/h 

  2. BOption (b)

    2.5 km/h 

  3. COption (c)

    3 km/h 

  4. DOption (d)

    3.5 km/h  

View answer & explanation

Correct answer

Answer: (a)A.

2 km/h 

Explanation not yet available.

Question 80

Delhi Police Constable 2025• Numerical Ability• Numerical Ability

A train 100 m long passes a 200 m platform in 15 seconds. Find the speed of the train. 

  1. AOption (a)

    72 km/h 

  2. BOption (b)

    60 km/h 

  3. COption (c)

    80 km/h 

  4. DOption (d)

    90 km/h 

View answer & explanation

Correct answer

Answer: (a)A.

72 km/h 

Explanation not yet available.