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Question 31

Delhi Police Constable 2026• Numerical Ability• Numerical Ability

The average age of a father and his son is 30 years.

If the father is 50 years old, how old is the son?

  1. AOption (a)

    8

  2. BOption (b)

    9

  3. COption (c)

    10

  4. DOption (d)

    11

View answer & explanation

Correct answer

Answer: (a)A.

8

Explanation not yet available.

Question 32

Delhi Police Constable 2026• Numerical Ability• Numerical Ability

An article has a marked price of ₹1000.

If sold at a 10% discount, what is the selling price?

  1. AOption (a)

    ₹800

  2. BOption (b)

    ₹850

  3. COption (c)

    ₹900

  4. DOption (d)

    ₹950

View answer & explanation

Correct answer

Answer: (a)A.

₹800

Explanation not yet available.

Question 33

Delhi Police Constable 2026• Numerical Ability• Numerical Ability

The length of the diameter of a circular track is 28 m.

What is its area?

(\( \pi=22/7 \))

  1. AOption (a)

    154 मीटर\( ^{2} \)

  2. BOption (b)

    616 मीटर\( ^{2} \)

  3. COption (c)

    308 मीटर\( ^{2} \)

  4. DOption (d)

    44 मीटर\( ^{2} \)

View answer & explanation

Correct answer

Answer: (a)A.

154 मीटर\( ^{2} \)

Explanation not yet available.

Question 34

Delhi Police Constable 2026• Numerical Ability• Numerical Ability

An item is marked at \( ₹2000 \). To sell it for \( ₹1500 \), what discount percentage must be given?

  1. AOption (a)

    \( 20% \)

  2. BOption (b)

    \( 22% \)

  3. COption (c)

    \( 24% \)

  4. DOption (d)

    \( 25% \)

View answer & explanation

Correct answer

Answer: (a)A.

\( 20% \)

Explanation not yet available.

Question 35

Delhi Police Constable 2026• Numerical Ability• Numerical Ability

A car travels \( 120 \text{ km} \) at \( 30 \text{ km/h} \). How long will it take?

  1. AOption (a)

    \( 2 \text{ hrs} \)

  2. BOption (b)

    \( 3 \text{ hrs} \)

  3. COption (c)

    \( 5 \text{ hrs} \)

  4. DOption (d)

    \( 4 \text{ hrs} \)

View answer & explanation

Correct answer

Answer: (a)A.

\( 2 \text{ hrs} \)

Explanation not yet available.

Question 36

Delhi Police Constable 2026• Numerical Ability• Numerical Ability

A man rows a boat \( 20 \text{ km} \) downstream in \( 2 \) hours and returns upstream in \( 4 \) hours. Determine the speed of the boat in still water.

  1. AOption (a)

    \( 6.5 \text{ km/h} \)

  2. BOption (b)

    \( 7.5 \text{ km/h} \)

  3. COption (c)

    \( 8.5 \text{ km/h} \)

  4. DOption (d)

    \( 9.5 \text{ km/h} \)

View answer & explanation

Correct answer

Answer: (a)A.

\( 6.5 \text{ km/h} \)

Explanation not yet available.

Question 37

Delhi Police Constable 2026• Numerical Ability• Numerical Ability

A student scores \( 300 \) marks, which is \( 60% \) of the total. What are the maximum marks?

  1. AOption (a)

    400

  2. BOption (b)

    500

  3. COption (c)

    450

  4. DOption (d)

    550

View answer & explanation

Correct answer

Answer: (a)A.

400

Explanation not yet available.

Question 38

Delhi Police Constable 2026• Numerical Ability• Numerical Ability

A table was purchased for \( \text{₹}850 \) and sold at a \( 5% \) loss. What was the selling price?

  1. AOption (a)

    ≈ \( \text{₹}808 \)

  2. BOption (b)

    ≈ \( \text{₹}805 \)

  3. COption (c)

    ≈ \( \text{₹}800 \)

  4. DOption (d)

    ≈ \( \text{₹}815 \)

View answer & explanation

Correct answer

Answer: (a)A.

≈ \( \text{₹}808 \)

Explanation not yet available.

Question 39

Delhi Police Constable 2026• Numerical Ability• Numerical Ability

The monthly salaries of A and B are in the ratio \( 4:5 \), and their monthly expenses are in the ratio \( 3:4 \). If both save \( \text{₹}2000 \) each month, what is A's monthly salary?

  1. AOption (a)

    \( \text{₹}6300 \)

  2. BOption (b)

    \( \text{₹}7200 \)

  3. COption (c)

    \( \text{₹}8000 \)

  4. DOption (d)

    \( \text{₹}9000 \)

View answer & explanation

Correct answer

Answer: (a)A.

\( \text{₹}6300 \)

Explanation not yet available.

Question 40

Delhi Police Constable 2026• Numerical Ability• Numerical Ability

A student rides a bicycle to his coaching class, covering \( 15 \text{ km} \) in \( 3 \) hours. What is his speed?

  1. AOption (a)

    3 km/h

  2. BOption (b)

    4 km/h

  3. COption (c)

    6 km/h

  4. DOption (d)

    5 km/h

View answer & explanation

Correct answer

Answer: (a)A.

3 km/h

Explanation not yet available.