Before watching the video, I thought the third option was just common sense, but I didn't know the 2nd one was 70% and the third one was 80% But still, the answer is still easy to find, by just finding 0.8³=0.512

@15:39, i noticed that all the numbers are squares +3, in particular, the squares of triangle numbers. 3=0^2+3, 4 = 1^2+3, 12=3^2+3, 39 = 6^2+3, 103=10^2+3. so the following numbers would be 15^2+3=228 and 21^2+3=444. neat how there are 2 ways to get the same values

The diagonal line is shifted slightly to compensate for the missing piece. An old Mathematics trick I saw 60 years ago in elementary school. Not too challenging.

But considering x+1= -x^2 does not violate any mathematical rules right

Dice is plural. You should have said 6 sided die.

Bro 3≠0

Good to know that I am a mastermind

but 79, 42, and 63 are all multiples of 7

Im born in 1098

This is one of your best recent videos!! I can't believe how much my grammar knowledge slipped.. (I'm gonna have to side-quest that for a bit!) The idea of covering more general knowledge is a good line IMHO (you can just add it on top of your amazing puzzles) MORE PLEASE!!

10:26 I had to find out what or who the names in the Classification part of the test were, so I did a bit of research and found that Bon Ton, Djer Kiss and Jonteel were or still are women's make up companies. Bon Ton seems to be the only company that still exists to this day but all existed circa 1926.

guess it's no surprise why US was at the forefront of technology and innovation. the standard far exceeds what's expected today. sad to see how far US education has fallen.

Norway, Denmark, and Greece are all peninsula countries, right?

I'm a 10-year-old and I spent 2 hours on this problem and I got 2.405😂😂

Puzzle 3 has another solution: just move the bottom left coin, next to the top left (outside of the box) - making a line of 5 coins, which technically has 2 lines of 4 coins.

for the match sticks one, the first solution that came to me is to turn the 7 to a 1 by taking the top match stick and put it to the 2 to turn it to a 6

The dogs were hot. Hotdogs. A show with large and small sausage pies... 😅

Yep. Can confirm, this problem has an unrealistic solution because you end up with six AND A HALF large dogs, and forty-two AND A HALF small dogs. So unless one of those dogs is a mixed breed that somehow enters BOTH categories... or TWO contestants chopped their dogs in half... you can't get a "real world" solution to the problem. In mathematical terms, the problem is broken because of the assumed stipulation that the answer must be an integer but the only true solution is a non-integer. Whoever wrote the question did not check their work for the solution first.

"you and we..."

11

The first part is very easy for a 6th grader. The second part is quite challenging, but still very doable. The third part is very challenging, but a 6th grader who is good at mathematics can surely solve it. It's normal for tests to have varying degrees of difficulty, in order to separate those who deserve to pass from those who deserve a perfect score. There is no shame in not being able to solve the last part if you are 6th grade.

As cool as this trick is, the example you used that made it seem unlikely to be helpful, strictly proves how useless the trick actually is if the % ends up as anything other than 50, 10, and 1. Why do I say that? Well ij your example, you still ended up using the exact same property that *Is taught in school*, breaking the % down into 10s and 1s, then add. 23% of 52 = 2 * 10% + 3 * 1% 23% of 52 = 2 * 5.2 + 3 * .52 23% of 52 = 10.4 + 1.56 23% of 52 = 11.96 It's the same answer. And since you felt the need to break it down after using the trick, there was zero point in swaping them as doing the second trick was just easier, faster, and requires less steps overall. The few exceptions would be if taking a % that's greater than 100% of some X. but at that point 137% of some X is just 1.37X. Which means you're better off just calculating for the multiplier first. so... Once again the trick is utterly and unequivocally useless 😒. It's neat, but ultimately useless.

Great explanations! I saw x = 1 but expected that the other solutions can only be found by graphic and numerical mehtods, or by some obscure non-algebraic stuff like "Lambert W function". :-)

Result is 11 (eleven) .👍

The reason it goes viral, it's simple. When a simple math problem like that is impossible to solve, what about other math problems 🤔 Like for instance on that really annoying SAT. Where there were numerous math questions redacted post the test because they had no answer or, with information they gave... They had multiple answers all of which were choices and each equally valid.

"Fifteen people visiting the galery" @22min is also not the right answer. You have no hypothesis of randomly pickup people first looking the picture, you cannot expect the 16th will probably think the same thing. The first 15 could be journalists, or art critics, whereas the 16th could be a paying visitor. It is undetermined.

"How many times do the hands of a clock overlap in a day?" Many clocks have three hands. By the time the second hand has caught up, unfortunately, the minute and hour hands are no longer overlapping until you get round to 12:00 noon or midnight when finally they all overlap.

To easily demonstrate why this is wrong. 9x÷3x =? Your way the answer is 3x^2, the right way, the answer is 3. When the number is attached to the bracket or term without an operation between them, it's considered all one term, like an invisible bracket.

@20:00 should be sagacity

Homie made it to adulthood without knowing what paper is made of, which is pretty wild.

@4:49, i was sure there's some trickey here and the answer was 48, since at that point he has not spent his salary

shame that the questions were lost for the artificial language section; it looks like it could have been fun to try to reason our way through (minus the stress of an actual test situation, of course)

Thus, using the repeated multiplication strategy, 5³=3*3*3*3*3=243 ? 😅

Presh I gotta tell ya, you are right but you are incomplete! I realised that if you add the same number 3 times to itself the final number is also between 1-9. This means there are MULTIPLE answers as long as the numbers are within 2 apart. Some examples, 296, 185, 148 and there would also be a bunch of others. As long as a bunch of additions don’t end in 0 then you are fine!!!

Puzzle 6: in the Middle Ages, the letter N, which comes from the Latin word "nulla" (meaning "nothing" or "null"), was sometimes used to represent zero in written contexts; thus, move one matchstick from the left side and make N in the right side, resulting I=NI (and thus the equality is preserved in the traditional Roman numerical system)

11:06 Gossard, Djer Kiss and Jonteel offer products adressed to women. Bulgaria, Greece and Roumania are neighbour states on the balcan peninsula in Europe.

a funny thing happens in maths when you start using fractions, for instance 1/2 x 5 = 1 over 2 x 5 over 1 which equals 5 over 2 5 over 2 is 5 x 1/2 or (1/2)+(1/2)+(1/2)+(1/2)+(1/2) so 1/2 x 5 does equal (1/2)+(1/2)+(1/2)+(1/2)+(1/2)

multiplication is column and row addition. it is literally repeated addition. 3a would be a+a+a 3 lots of a if a=3 then 5a would be 3+3+3+3+3 5a = 5xa and a =3 so that is 5x3 = 3+3+3+3+3

It would be interesting to see a statistic on how many students managed to solve this test. I would assume these questions were not that hard to those students.

I got 42 simply by using my eyes and some elementary calculation.