Understand the rule first
Test more than one possible grouping rule. Prefer a precise rule shared by exactly three options, then explain why the fourth fails.
Find a defensible shared rule and identify the item that breaks it.
Test more than one possible grouping rule. Prefer a precise rule shared by exactly three options, then explain why the fourth fails.
Choosing the least familiar word instead of testing a common property.
Reusable method: Test at least two possible grouping rules before deciding.Three instruments are played by blowing air.
Answer D: violin
Flute, trumpet and clarinet are wind instruments; violin is a string instrument.
Quick method: Test at least two possible grouping rules before deciding.
Three are metals.
Answer A: glass
Copper, iron and gold are metals; glass is not.
Quick method: Test at least two possible grouping rules before deciding.
Three words describe quiet speech.
Answer B: stride
Whisper, murmur and mutter describe quiet speech; stride describes walking.
Quick method: Test at least two possible grouping rules before deciding.
Compare the number of days in each month.
Answer C: June
January, March and May have 31 days; June has 30.
Quick method: Test at least two possible grouping rules before deciding.
Three belong to the same animal class.
Answer D: salmon
Sparrow, eagle and robin are birds; salmon is a fish.
Quick method: Test at least two possible grouping rules before deciding.
Three options are polygons with straight sides.
Answer C: circle
A circle has no straight sides or vertices; the others are polygons.
Quick method: Test at least two possible grouping rules before deciding.
Three are trees.
Answer D: rose
A rose is a flowering shrub; oak, elm and pine are trees.
Quick method: Test at least two possible grouping rules before deciding.
Three words name young animals.
Answer A: cow
A cow is an adult animal; kitten, puppy and foal name young animals.
Quick method: Test at least two possible grouping rules before deciding.
Check which numbers are perfect squares.
Answer B: 45
16, 25 and 36 are 4², 5² and 6². 45 is not a perfect square.
Quick method: Test at least two possible grouping rules before deciding.
Count and compare every letter.
Answer C: LINES
LISTEN, SILENT and ENLIST use E, I, L, N, S, T. LINES has only five letters and lacks T.
Quick method: Test at least two possible grouping rules before deciding.