Spot the odd one

Exercise and reference answers

Questions

1. Items

   1. Rational
   2. Closure
   3. Associativity

   Odd item

   Rational

2. Items

   1. a + 0 = a
   2. a + 1 = a
   3. a × 1 = a

   Odd item

   a + 1 = a

3. Items

   1. Additive identity
   2. Multiplicative identity
   3. Distributivity

   Odd item

   Distributivity

Explanation