Contest-Closed-31-8-2018

35 min read

HOW TO PARTICIPATE:

 

Step 1: Choose your class.

Step 2: Pick a subject (you can see both challenges before finalising).

Step 3: Make a video answering the challenge (read the rules).

Step 4: Enter voucher code and upload video! Done!


Contest ends
on: 31 August, 2018 (6 PM)

New Contest begins on: 1 September, 2018

HOW TO PARTICIPATE:

 

Step 1: Choose your class.

Step 2: Pick a subject (you can see both challenges before finalising).

Step 3: Make a video answering the challenge (read the rules).

Step 4: Enter voucher code and upload video! Done!


Contest ends
on: 31 August, 2018 (6 PM)

New Contest begins on: 1 September, 2018

CLASSES 3 TO 5

In two cities, Delhi and Chennai, in the month of January, same amount of water is being boiled in a container. The boiling temperature of water in both the containers is 100°C, yet more fumes are seen above the water in Delhi than in Chennai.

(Hint: Delhi is colder than Chennai)

Make a video explaining why there are more fumes seen in Delhi than in Chennai.

Rules & Instructions
Enter Contest

Multiplication of 154 and 23 is shown below using two different methods. One is incorrect while the other is correct.

Part (1): Why is Method I incorrect while Method II correct?

Part (2): What is the rationale behind Step 1 and Step 2 in Method II? Explain why we follow Method II to correctly multiply two numbers.

Make a video explaining the above.

Rules & Instructions
Enter Contest

CONTEST BEGINS

CLASSES 6 TO 8

Consider an object with the VIBGYOR colours, as shown in the picture. Light is getting reflected from all the colours enabling us to see them.

Part (1): We see an object when light is reflected by the object and received by our eye. Why do we not see the light rays themselves?

Part (2): Since White light is made of all the seven colours, explain why the light getting reflected from the seven colours, shown in the picture, does not recombine giving us white light?

Make a video explaining the above.

Rules & Instructions
Enter Contest

LCM of three numbers: 10,12 and 15, is found by using the method shown below.

Part (1): Explain the meaning of LCM (do not merely state the steps).

Part (2): Why does the above method work in finding LCM? Why does multiplying 2, 3, 5 and 2 gives us the LCM?

Make a video explaining the above.

Rules & Instructions
Enter Contest

CONTEST BEGINS

CLASSES 9 AND 10

Alex starts from ‘A and goes to ‘B as part of his journey. Meanwhile, he slows at the speed-breakers and stops for few moments at zebra crossings, traffic signals and the bakery shop. He slows down at turnings on his path: A-B-C-D-A.

Analyze the situation and draw the following graphs from A to B:

  1. Distance vs Time graph
  2. Velocity vs Time graph

Make a video explaining the above.

Rules & Instructions
Enter Contest

We usually analyse data using its Mean. If we use its Median and Mean, both, then it may give us better sense of the data.

You have following information about the marks of the students of your class in an exam of 100 marks:

  • Mean of students’ marks = 60

  • Median of the students’ marks = 85

Part (1): What can you infer about the entire class’ performance from the above data? What can you comment about the distribution of marks in the class?

Part (2) Explain a real-life situation where median is a better representative of data (i.e., more useful) than mean.

Make a video explaining the above.

Rules & Instructions
Enter Contest

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          Rules & Instructions:

          A) INSTRUCTIONS FOR CREATING AND UPLOADING VIDEO

          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.

          B) JUDGING CRITERIA

          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.