A math question on progression
A boy starts adding consecutive natural numbers starting from 1. After sometime he reaches a total of 1000 when he realizes he has double counted a number. What is the number he has double counted??
slarb....That's the sound of my head exploding when I tried to figure this out. As such...my answer is splarb.
As far as I can figure, he has double counted the number ten (10).
You are right... may I know How did u figure it out
I wish I had a brilliant mathematical answer, but it's been far too long since I have taken any math! I just did this via the brute, clumsy way of adding numbers. When I reached a total of 990, I knew the only way to reach exactly 1000 was with a 10.
Well a correct solution is a correct solution so cheers to that
Thanks! Here's a little follow-up: Inspired by the other questions about progressions, I just now worked this using the formula stated elsewhere, and it was very neat! If I practice it enough, I'll learn it well enough to use it (first) next time.
by Jessee R 6 years ago
Another Math question on progressionA boy starts adding consecutive natural numbers starting from 1. He reaches a total of 575 when he realizes he has missed a number. What can be said about the missed number?
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