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M Decoder

Imagine yourself in a room filled with puzzles. The only way to get out is by solving all of them in the most efficient way possible. Featuring a range of intriguing puzzles, paramount problems, and mind-blowing riddles, this one-of-a-kind mathematical event seeks to bring out the Edward Nygma in you.

Do you have what it takes to be the Riddler? Find out.

Prize Money INR 30,000

Test Link: pragyan.org/mdecoder

Date: 6th March 2020

This is an online event spanning three days which will be open for 2 hours each day from 9:30 p.m. to 11:30 p.m. The participant can start the contest anytime within this time frame and will be allowed to play for 90 minutes from the start time until the portal has been closed.

The event will have 3 sections (hard, medium and easy). The participant will be directed to the hard section at first and the other sections remain locked. If the participant feels the need to shift to the next section (medium),  the hard section can be locked, and one can move on to the medium section. The same procedure is applicable to the transition from the medium to easy sections. The participant with the most points at the end of the third day wins. Only one chance will be given to the participant on any particular day to go back from easy to medium or from medium to hard and this can be used only on one of the three days.

If you missed out on a day of participation, you can still solve the previous day's questions in the 2 hour period the next day. As you may expect, the scores will be reduced for those problems. For further details about scoring, please visit the judging criteria. You can only see questions from the immediate previous day. That is, you cannot see the 1st day's questions on the 3rd day.

  • This is an individual event. 

  • Participants are required to login to the portal between 9:30 p.m. and 11:30 p.m. on each day to compete.

Judging Criteria:

Maximum points:

Hard - 1000

Medium - 600

Easy - 300

Minimum points:

Hard - 500

Medium - 300

Easy - 150

When you solve the question in your first attempt, you will receive maximum points, and when you solve the same question after moving up from an easier level, you will receive minimum points.

Scorecurr = Scoremax - (Scoremax * time) / (Scoremax + time)

Scorecurr = Current Score

Scoremax = Maximum Score

Time is measured in seconds


Will be updated soon.


1) What are the weights assigned to each section?

Hard - 1000 points
Medium - 600 points
Easy - 300 points

2) What if many people copy my answer?
For each section, the scoring starts out with maximum points and reduces as time progresses. The formula is given in the Judging Criteria. The minimum number of points a person can score is capped at (Max points for section)/2 i.e. Hard – 500, Medium - 300 and Easy - 150. 

3) Can I come back to the Hard section after I finish Easy?
You can move one level up on any one of the three days.

4) What happens if I finish before time?
Your score is locked and you can’t proceed to earlier sections.

5) Will spare time be carried over to succeeding days?
No. Spare time will not be carried over to the succeeding days.



1) Tejas: 96775 50802
2) Giri: 93813 23227
3) Aqib: 91234 36335

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