Question 1
Among the numbers 5, 7, 11, 15 and 19, which number cannot be expressed as a sum of two prime numbers?
IMAS 2016 — Middle Primary Grades 3–4 — Round 2 Question 1
IMAS · IMAS 2016 — Middle Primary Grades 3–4 — Round 2
IMAS · IMAS 2016 — Middle Primary Grades 3–4 — Round 2