# The Book of Wisdom - Episode 7 - In the Shadows

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• 18+13=531

ID: PöLë NöRD

server: https://ts20.travian.co.id

1st Time Lead : ID8 Sesi1 : Punggawa (2010) EXN

2nd Change : ID5 Sesi3 : HollyKnight & Punggawa (2012) AKR

Last play ID1 Round5 : Punggawa (2013) WIRATA

COVID-19 WFH (Nostalgia Travian)

Idx27: Star of Victory, Idx28: Punggawa (2019)

Codex ss2: PöLë NöRD (2020)

• the correct combination is 531.

a+b:=(a-b)_(a+b) where x_y equals xy

• 18 + 13 = 533

TS1.travian.co.id

id : Asta

• 531

Victorius Aut Mortis!

S3 Session 2: Resists ( Raven )
TS1 Session 4: Resists ( Raven )

TS8 Session 2: Resists ( Red )
TS8 Session 3: Resists ( Fire )
TS1 Session 7: Resists ( Raven )
TS3 Session 7: Resists ( Raven )
TS1 Session 9: Resists ( Raven )
TS29 Session 1: Resists ( Raven )

• 7+6=1 13

9+7=2 16

6+3=3 9

8+4=4 12

So, for correct combination to unlock is definitely

18+13= 5 31

lucknuts

ts1.travian.co.id

• Hi, my Id is B.Clover

server = Asia x3 (tx3.asia.travian.com)

My answer to this math riddle :

using the formula

18 + 13 = xy

where,

x : the subtraction of both number.

y : the addition of both number.

1. x = 18 - 13

x = 5

2. y = 18 + 13

y = 31

Thus, the solution is 18 + 13 = 531.

Thank you

• 18 + 13 = 531

Because every time we add up what is given, and then we have to generate 1 number and put it before the result. This 1 number is generated by subtraction of the given numbers. So, 18+13 adds up to 31. 18-13 = 5. So we get 531.

• The solution is 531 (18-13)(18+13)

server : NL1, Account : Mispoes

• 531

Pria_Tomboy since ts19 session 1
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