Tap the item that does not belong

Exercise and reference answers

Questions

1. Items

   1. Concave
   2. Convex
   3. Cuboid
   4. Plane

   Reason

   Cuboid is a solid shape; the others are types of mirrors.

   Odd item

   Cuboid

2. Items

   1. Sodium
   2. Potassium
   3. Calcium
   4. Sulphur

   Reason

   Sulphur is a non-metal; the others are metals.

   Odd item

   Sulphur

3. Items

   1. Neuron
   2. Artery
   3. Vein
   4. Capillary

   Reason

   A neuron is a nerve cell; the others are blood vessels.

   Odd item

   Neuron

4. Items

   1. Reflex
   2. Magnetic
   3. Voluntary
   4. Involuntary

   Reason

   Magnetic is not a type of action; the others are.

   Odd item

   Magnetic

5. Items

   1. Ohm
   2. Volt
   3. Litre
   4. Ampere

   Reason

   Litre measures volume; the others are electrical units.

   Odd item

   Litre

Instructions

Tap the one that doesn't fit.