It is amazing how she figured out a smart solution all by herself 🌟

Math teacher, she has surely heard of Gauss. She's just acting

I cant believe a math teacher is not familiar with Gauss sum.

She found to Gauss Solution hundreds of years later 😂

1+99,2+98,3+97,etc is the fastest way of figuring it out cause you always get 100 and you can cancel 2 numbers out each time. So you get to 4900 + 50 + 100 = 5050

Sn = 1+2+...n Reversed: Sn = n+n-1+...+1 Add them: Sn + Sn = (n+1) + (n-1 +2) + ... (n+1) Group and divide Sn = n (n+1) / 2

She's a maths teacher so that's cheating, shoulda asked someone who's not a maths teacher so then it's not cheating. Plenty non maths teachers in London, just ask them if they're a maths teacher they'll tell you no most likely because there's more people who aren't maths teachers than people who are maths teachers hope this helps.

I feel like we should be multiplying too.

Iffff she really never saw that before and is not a math teacher, then it's amazing.

Gauss in 5th standard while writing formula Sn = n/2 (a +l)

That's How Gauss solved it in Class when he was Young When young Carl Gauss was asked to add all numbers from 1 to 100, his teacher expected it to take time.But Gauss quickly noticed pairs: 1+100, 2+99, 3+98… each = 101. There are 50 such pairs → 50 × 101 = 5050

Awesome. I used a different method (hers is better though). I know 1+2+3+4...10 = 55 So adding all the digits in 1s place - 55X10 = 550. Now adding the 10s... 100+200+300...+900 = 4500 (using same knowledge 1 through 9 adds to 45). Total 550 + 4500 = 5050.

Idk if this is right, but I think you find the total number of numbers, which is 100, and then you find out how many pairs of numbers within that number = 100. 1 + 99 = 100 2 + 98 = 100 And so on. So 50 pairs x 100 = 5000 But there is only 1 50 + 49, so 4999

My method was similar. I summed up 49 pairs of 100 and added the last 100 and the sole 50 that had no pair.

sum of first 'n' natural numbers = n(n+1)/2 I don't mean to be rude, but how does a math teacher not know this?

It immediately became unimpressive when she said she was a math teacher at the end lol.

She did not figure it out by herself. She teachs that all the time. Even if the video is pretty explanatory, the caption is misleading.

The way I thought of it is pairing to sum up to 100. At the end you’d be Left with 100, (49times) plus the 100 and 50 which couldn’t be paired to sum up 100. That is (49*100)=4900+100+50=5,050

Αh, I see you are introduced to Ms. Emma Gauss.

100 numbers with an average of 50.5. 100*50.5 = 5050.

So maths teacher didn't know n*(n+1)/2 😁 So winder asian and indian replacing these pdf-file race

she didn’t come up with this just now

how a math teacher dont know n.(n+1)/2 formula

Cool problem solving, but shouldn't a math teacher know the sum of the first n natural numbers is n(n+1)/2?

You: "All by herself" She: "I'm a maths teacher" She didn't. She knew how to do it perfectly fine before the question was even asked.

Or you could round the lower 50 numbers down to 1 (50 x 1 = 50), and the higher 50 numbers to 100 (50 x 100 = 5000). Add them together to get 5050.

Did it in my head and it's 5050 1 to 10 adds to 55 11 to 20 adds to 155 21 to 30 adds to 255 31 to 40 adds to 355 ....... The pattern is an increment of 100 and it's 100 to 900 so essentially 1 to 9 summed up without the 10(which adds up to 45) and extra 00 (55 * 10) + 4500

Nice job pretending she didnt know the famous assumed first math challenge of Gauss.

A teacher? This was painfully slow to watch her stumble around like this.

Her brain works very well, I'd like mine would too 😇

I thought it was amazing until she said she was a math teacher then I'm like wait wouldn't she already know this one I feel like maybe she did once and she was actually just remembering it over the course of this

Pair the first number with the last and multiply by 50 100 +1 = 101 99 + 2 = 101 98 +3 = 101... and so forth. do it 50 times = 101 X 50 = 5050

This is what I did on my head. 0+100 + 1+99 + 2+98 + ...+49+51 that´s 50x100=5000 need still to add 50: 5000+50=5050 I used to be fairly good at this kind of thing. The difference now is that even if got it right I don´t feel the certainty I used to.

5050 1+99100 2+98=100 ×××× 49+51=100 49×100=4900 50 100 4900+50+100=5050

Gauss did that when he was 8 :)