I can be found by summing the first n natural numbers. What am I if n equals 10?
Category: Math · Difficulty: medium
Hint: Consider the formula for summing numbers.
Answer
A fifty-five
Explanation
The sum of the first 10 natural numbers is 55, calculated as n(n+1)/2.
This is a medium math riddle — a moderate challenge for most people. The answer is A fifty-five.
More Math riddles
- If I am half of my age now, in ten years I will be three times my current age. How old am I?
- I’m the product of all positive integers up to a certain point, but when you meet me at zero, I hold the…
- What number can you divide by two and still have a whole, yet multiply by itself to reach a goal? What am I?
- You have a 5 kg weight and a 3 kg weight. If you combine them, what is their total weight?
- What do you get when you multiply 9 by 0?
- You have 12 identical-looking coins, one of which is heavier or lighter. You can use a balance scale three…
- What is the smallest prime number that can be expressed as the sum of two positive even integers?
- What is a straight line that can be drawn through two points on a graph called?