alleryWhat is the smallest group that contains the natural numbers?
AThe fractions
BThe integers
CThe even numbers
DThe primes
Answer & Solution
Correct answer: B. The integers
1. The natural numbers cannot be subtracted freely, so they are not a group under addition.
2. Adding negatives and zero gives the integers.
3. The integers are the smallest group containing the natural numbers.
_Source: Wikipedia, Natural number, Addition_
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