All the factors are found when the next value is part of a pair that has already been identified. The difference is 3. The 3rd multiple of seven is 7 × 3 = 21. The 4th multiple of six is 6 × 4 = 24.

Multiple myeloma is a rare type of blood cancer that forms in plasma cells, a white blood cell that makes antibodies and helps you fight infection. The cancer occurs when the plasma cells inside ...

Scientists don't know exactly what causes the mutations that turn plasma cells cancerous, but certain factors may affect a person's risk. A family history of multiple myeloma and certain plasma ...