Logic & Deduction

Which word is the ODD ONE OUT?

• AOak✓
• BRose
• CTulip
• DDaisy

Answer: Rose, tulip and daisy are flowers; an oak is a tree.

Which word is the ODD ONE OUT?

• ACube✓
• BSquare
• CCircle
• DTriangle

Answer: Square, circle and triangle are 2D shapes; a cube is a 3D shape.

Which word is the ODD ONE OUT?

• AApple
• BCarrot✓
• CBanana
• DPear

Answer: Apple, banana and pear are fruits; a carrot is a vegetable.

Tom is taller than Sam. Sam is taller than Joe. Who is the shortest?

• ATom
• BJoe✓
• CSam
• DCannot tell

Answer: Order from tallest: Tom, Sam, Joe. So Joe is the shortest.

If all Bloops are Razzies, and all Razzies are Lazzies, then all Bloops are definitely:

• ALazzies✓
• BNot Lazzies
• COnly Razzies
• DCannot tell

Answer: Bloops → Razzies → Lazzies, so all Bloops must be Lazzies.

Anna is older than Ben but younger than Carl. Who is the oldest?

• AAnna
• BBen
• CCarl✓
• DCannot tell

Answer: Carl is older than Anna, who is older than Ben, so Carl is the oldest.

Which word is the ODD ONE OUT?

• AHammer
• BSaw
• CDrill
• DWood✓

Answer: Hammer, saw and drill are tools; wood is a material.

Sara has more marbles than Leo. Leo has the same as Mia. Who has the fewest?

• ASara
• BMia only
• CCannot tell
• DLeo and Mia (equal)✓

Answer: Sara has the most; Leo and Mia are equal and both have fewer than Sara, so they share the fewest.

Ann is taller than Ben. Ben is taller than Cara. Who is shortest?

• AAnn
• BBen
• CCannot tell
• DCara✓

Answer: Ann is above Ben and Ben is above Cara, so the order is Ann, Ben, Cara, and Cara is shortest.

All cats have whiskers. Tom is a cat. What must be true?

• ATom is grey
• BAll whiskered animals are cats
• CTom is a kitten
• DTom has whiskers✓

Answer: If every cat has whiskers and Tom is a cat, then Tom has whiskers. Nothing else follows.

Dev sits between Eve and Fay. Eve is on the left. Who is on the right?

• ADev
• BFay✓
• CEve
• DCannot tell

Answer: Dev is in the middle and Eve is on the left, so Fay must be on the right.

Some birds cannot fly. Penguins are birds. What must be true?

• APenguins cannot fly
• BPenguins are birds✓
• CAll birds can fly
• DNo birds can fly

Answer: The statement only tells us SOME birds cannot fly, so we cannot conclude anything about penguins beyond their being birds.

The match is after lunch but before tea. When is it?

• AIn the morning
• BIn the afternoon✓
• CIn the evening
• DAt night

Answer: Between lunch and tea places it in the afternoon.

If it rains, the match is cancelled. The match went ahead. What follows?

• AIt rained
• BThe match was cancelled
• CIt did not rain✓
• DNothing follows

Answer: If rain always cancels the match, and the match happened, then it cannot have rained.

Five friends race. Kim beats Lee. Lee beats Max. Max beats Nia. Who is fastest of these four?

• ALee
• BMax
• CNia
• DKim✓

Answer: Kim is ahead of Lee, who is ahead of Max, who is ahead of Nia, so Kim is fastest.

Sam is younger than Tia but older than Uma. Who is oldest?

• ASam
• BUma
• CCannot tell
• DTia✓

Answer: Tia is above Sam and Sam is above Uma, so Tia is oldest.

Every pupil in the class plays an instrument. Priya is in the class. What must be true?

• APriya plays an instrument✓
• BPriya plays the piano
• CEveryone who plays is in the class
• DPriya is the best player

Answer: The rule applies to every pupil, so it applies to Priya — but it says nothing about WHICH instrument.

The blue box is heavier than the red one. The red one is heavier than the green one. Which is lightest?

• ABlue
• BRed
• CCannot tell
• DGreen✓

Answer: Blue is above red and red is above green, so green is lightest.

No reptiles have feathers. A robin has feathers. What must be true?

• AA robin is a reptile
• BSome reptiles have feathers
• CA robin is not a reptile✓
• DAll feathered animals are robins

Answer: If no reptile has feathers and a robin does, a robin cannot be a reptile.

Class starts at 9:15 and lasts 50 minutes. When does it end?

• A10:05✓
• B10:15
• C9:55
• D10:50

Answer: 9:15 plus 50 minutes is 10:05.