Spot the one that does not fit

Exercise and reference answers

Questions

1. Items

   1. Common ratio
   2. Common difference
   3. First term a
   4. Last term l

   Odd item

   Common ratio

2. Items

   1. Add a constant
   2. Subtract 5
   3. Multiply by 3
   4. Square each term

   Odd item

   Square each term

3. Items

   1. Sum of naturals
   2. Sum of squares
   3. Sum of cubes
   4. Sum of primes

   Odd item

   Sum of primes

4. Items

   1. Ratio 2
   2. Ratio 3
   3. Ratio 0.01
   4. Difference 5

   Odd item

   Difference 5

Instructions

Tap the item that does not belong with the rest.

Explanation