source Synergy source take 10 skill check skill synergy table the book d20 SRD source Aid Another source take 10 source source source take 10 take 10 Skill Synergy source source Aid Another source take 10 Take 20 source skill checks take 10 source opposed checks opposed checks take 10 skill check source http://www.d20srd.org/srd/skills/usingSkills.htm opposed checks source opposed checks take 10 skill check source source take 10 take 10 take 10 source source source source Aid Another take 20 source Difficulty Class http://www.d20srd.org/srd/skills/usingSkills.htm#skillChecks 3E DC method d20 SRD Taking 20 take 10 source source Take 20 source source source source opposed checks Aid Another source source source source source take 10 Difficulty Classes take 10 source