What is the sum of the unique prime factors of 210?
Category: Math · Difficulty: expert
Hint: Identify the primes that multiply to 210.
Answer
17
Explanation
The prime factors of 210 are 2, 3, 5, and 7. Their sum is 2 + 3 + 5 + 7 = 17.
This is a expert math riddle — one of the harder riddles here. The answer is 17.
More Math riddles
- I can tell you how long or how wide, yet I am not a ruler. I can show you the space, but I’m not a traveler.…
- I am a sum that results in twenty-one. If you subtract me from thirty, you get my other half. What am I?
- I am a value that represents the solution to an equation involving two variables. What am I?
- In a game of flips, I alternate between states. When I start at zero, I easily climb, but once I hit five, I…
- I can unlock the secrets of the universe, yet I am often overlooked. I am the foundation of structure. What…
- I can describe a specific arrangement or sequence, and I often determine outcomes based on my arrangement.…
- I can grow rapidly with a simple change, yet I am just a product of my predecessors. What am I?
- I start with one, and two follows me. I grow by adding what came before. What am I?