Q#11: Why do trains make the ‘Khadak Khadak’ sound? Winners Announced

February3, 2021
by Apoorva
2 min read

Dear school leaders,
For MTLT#11, we asked you this question:

You might have noticed the ‘Khadak Khadak’ sound made by a moving train.
On one of your journeys, this sound is louder as compared to a journey few
months ago. In which month of the year are you travelling currently ?

(A) May
(B) September
(C) December
(D) Cannot find

Correct Answer and Explanation:

How School Leaders responded?

Lucky Draw Winners

1. Dr. Naveen H M, Sanjay Ghodawat International School 👏
2. Sunil Bhakare, Eklavya Model Residential School, Nashik 👏
3. Leju Sabu, Jesus Saviour’s School, Sirhind 👏

Would you like to know how Open Door can help your children think with similar beautiful questions?

Share this question with your friends:


    Apply for Position

    Upload your Resume/CV *

          Rules & Instructions:


          1. Create a video of less than 5 minutes.
          2. Size of video should be less than 100MB while uploading.
          3. You can use one Voucher Code to upload video only once.
          4. You can use animations and other visual effects to help improve presentation.
          5. The video should have the student who won the voucher as the primary explainer.


          1. Explanation (10 points)
          (i) Accuracy of explanation or relevant explanation of the given challenge.
          (ii) Explanation of ALL the questions asked.

          2. Presentation (5 points)
          (i) Video should not exceed given time constraints.
          (ii) It should be understandable.
          (iii) Good use of props and effects.

          3. Early-bird
          (i) The first 1000 entries will get bonus points for submitting early.

          Note: Open Door will not entertain requests to share scores.