Each participant has completed one of three activities: Dance, Cricket, or Exercise. The scientists have asked the analysts to measure the change in mineral levels using the Saliva Anomaly Score (SAS). (Refer Referance Image for the formula)

A higher SAS indicates a greater deviation and potential risk of mineral imbalance. 

The absolute value shows the distance of a number from zero, ignoring whether it's positive or negative. 

Example: The absolute value of -5 is 5 and the absolute value of 5 is also 5. 

Participant	Activity	Na (Before)	Na (After)	K (Before)	K (After	Fe (Before)	Fe (After)	B (Before)	B (After)
A	Dance	96.2	105.5	33.4	142.0	8.4	8.9	1.92	1.85
B	Cricket	92.0	89.6	35.6	62.3	9.0	9.8	2.10	1.90
C	Exercise	91.4	116.8	30.5	168.2	10.2	8.3	1.80	2.08
D	Dance	97.5	106.1	32.0	138.5	8.7	9.0	1.95	1.84

 

Question: 

Can you identify which participant may be at the highest risk of mineral imbalance? 
Use the formula to calculate the Saliva Anomaly Score and determine who needs further attention. 

 

The scientists have collected saliva samples from four athletes who took part in one of the three activities, such as Dance, Exercise, or Cricket. 

Participant	Activity	Na (ppb)	K (ppb)	Fe (ppb)	B (ppb)
A	Dance	106.14	193.87	8.47	1.90
B	Exercise	244.60	909.93	8.56	2.49
C	Exercise	230.70	850.12	8.40	2.52
D	Cricket	294.55	859.23	8.23	1.87

 

To detect abnormal mineral levels, the system calculates a Saliva Anomaly Score using the following formula: 

Saliva Anomaly Score=∣Na−100∣+∣K−200∣+∣Fe−9∣+∣B−2∣  

This score shows how much a participant's saliva composition deviates from ideal mineral levels. 

The absolute value tells us how far a number is from zero, regardless of whether it's positive or negative. 

Example: The absolute value of -5 is 5, and the absolute value of 5 is also 5. 

Question: 

Can you identify which participant might be at the highest risk of mineral imbalance?  
Use the formula to calculate the anomaly score and determine who needs attention.

System Display: 

A sequence of octal digits appears on the Serial Monitor. ( Refer Referance Image)
Display Error: CHECK ORIENTATION SETTINGS

Decode Clue: 

The string shown is not the actual answer — it’s a disguise. 

First, expand each octal digit into its 3-bit binary equivalent. Then, split the full binary sequence into groups of 4 bits — starting from right to left.
Finally, rebuild the actual PIN by converting those 4-bit codes into normal decimal digits (0–9) using the reference table.

Hint: Octal → Binary. And remember — what you see might be flipped! 

(This is not the actual method of converting octal to decimal. The team has developed a unique set of rules to enhance security and prevent direct decoding.)

Conversion Reference Table: 

Decimal Digit	0	1	2	3	4	5	6	7	8	9
Binary (4-bit)	0000	---	0010	0011	---	0101	---	0111	1000	1001
Octal-style (3-bit)	000	001	---	011	100	---	110	111	--- ---	--- ---

Note:  Use logical reasoning to complete the missing data and decode the actual PIN. 

Question: 

What was the actual PIN entered before the lock activated security mode? 

System Display: 

A binary string appears on the Serial Monitor, along with the following warning. (Refer Referance Image)
Display Error: CHECK ORIENTATION SETTINGS

Decode Clue: 

The string shown is not the actual answer — it’s a disguise. 

1. Split the binary string into groups of 4 

2. Convert each group into a decimal digit (0–9). 

Hint: Binary → Decimal. And remember what you see might be flipped! 

 

Decimal Digit	0	1	2	3	4	5	6	7	8	9
Binary (4-bit)	0000	---	0010	0011	---	0101	---	0111	1000	---

Note: Fill in the missing binary values to decode the hidden PIN correctly. 

Question: 

What was the actual PIN entered before the lock activated security mode?