Aquarius topping the list is expected. Air signs are smart and creative. Aquarians are reasonable, dispassionate thinkers.
They also use that broad perspective. Most Aquarians can instantly create new ideas and solve challenging challenges.
Scorpio is smart like Aquarius. Scorpios have excellent cognitive abilities including critical and inquisitive thinking.
Scorpio's obsession with meaning makes them so smart. Air signs are intellectually curious too. Scorpio revels in deep insights.
Mercury rules Gemini. This sign has a mental advantage over most others because Mercury rules it.
Geminis are brilliant. Pure intellectuals. They excel in filtering, organising, and interpreting diverse information.
Sharp, sober pragmatism compensates for their mental weakness. They diligently cover up any mistakes.
Capricorn's long-term aims succeed because they stay focused and objective. Capricorns are pragmatic and can learn from their mistakes.
Mercury regulates intelligence, learning, and communication. Mercury is exalted in Virgo yet dominates both Gemini and Virgo.
Virgos are great planners and can spot any weaknesses. A work architectural design or a multi-destination family vacation.