Question 8
How many different prime numbers a’s are there such that a + 20 and a + 40 are also prime numbers?
IMAS 2018 — Upper Primary Grades 5–6 — Round 2 Question 8
IMAS · IMAS 2018 — Upper Primary Grades 5–6 — Round 2
IMAS · IMAS 2018 — Upper Primary Grades 5–6 — Round 2