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Weaknesses
Your weakest types
Zen
No clock, no points – just practice as long as you like
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Every past daily round
Geometry
Angle
Median –
Bisect
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Chain halving
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Center
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Right angle
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Parallel
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Copy length
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Mirror
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Halve the area
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Complete the corner
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Vanishing point
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Continue the curve
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Circle from an arc
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Equally far
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Find the axis
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Amounts & proportions
Ratio
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Estimate amount
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Fill the glass
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Slice of cake
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Double the area
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Estimate the share
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How often does it fit?
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Color
Color memory
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Guess the RGB
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Time & motion
Intercept
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Time sense
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Arrival
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Rhythm
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Same speed
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Optical illusions
Beat the illusion
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Hidden line
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Compare brightness
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Memory
Remember positions
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Trace the shape
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Set the clock
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Remember the length
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