The eagle's head opened its mouth and made no sound, but she vaguely felt that there seemed to be a magical power looking at her from the knocker in front of her. Obviously, this magical knocker, like the sorting hat, had its own consciousness.
Since arriving at Hogwarts, she had to leave some footprints, otherwise, it would be boring.
The little silver-haired loli smiled mischievously and said in a very tempting tone: "As far as I know, many mathematical problems often have a unique objective solution at a basic level."
"Math problems? Simple calculations do not test a student's wisdom", the voice of the eagle-shaped door knocker was obviously a little confused.
"And what about this?"
Elena remembered a bit and said slowly in an extremely excited tone, "Put the chicken and the rabbit in the same cage, count from above, there are thirty-five heads, count from below, there are ninety-four feet. How many chickens and rabbits are in the cage?"
Pausing, the little silver-haired loli added, "And, you only need to change a few numbers, you can formulate an infinite number of interesting questions like this."
.....
After the knocker in the shape of an eagle fell silent for a few seconds, it nodded slightly, "What you said makes sense, I have to think about it. Thank you."
Once the conversation was over, the knocker did not speak anymore and returned to its original bronze sculpture form.
It actually worked!
Elena secretly waved her little fist and walked away happily.
"Burleigh, I think it's almost time, let's go back."
God bless this year's Ravenclaw students. However, as long as they are patient enough, they can still calculate the results correctly.
....
Soon, Elena, with a small unknown joy, returned to the eighth floor of the castle with the house-elf Burleigh.
"Well then, it's time to see Dumbledore."
Elena took a deep breath and looked at the stairs next to the huge stone beast, preparing to ascend.
Suddenly she realized that at the end of the hallway, there appeared to be a classroom that had not been visited. It seemed that she had inadvertently overlooked it when she turned to leave.
Elena looked curiously ahead. From her impression, there shouldn't be anything special on this floor other than what was necessary.
Wait, is it true that there is an unexplored place? The silver-haired little girl's eyes suddenly lit up as she asked excitedly.
"Burleigh, what is that place? Isn't it...?"
"That..."
Walking behind Elena, Burleigh raised his head and looked in the direction of the girl's arm. He replied in a flat tone, "It seems to be an abandoned classroom."
"No, I didn't see it before."
Elena shook her head seriously, told herself, and ran towards the classroom without hesitation.
"Huh? Oh..."
The little silver-haired girl opened the door hopefully, gazed inside, and her small face suddenly fell with a sigh.
As Burleigh said, it was indeed an abandoned classroom.
The wooden desks and chairs were in disarray in the back of the classroom. Judging by the dusty empty bottles and wooden shelves, it seemed that this place was once used as a potions or herbology classroom.
"Well, what's that?"
Elena looked to the back, prepared to turn around and leave, but suddenly she stared intently.
In the front of the classroom near the window, there was a peculiar black piano.
Unlike the chaos at the back of the classroom, judging by the shiny cover of the piano, someone should regularly come to play or take care of this expensive piano.
"I didn't expect there to be a piano-loving professor in Hogwarts. This was not mentioned in the original book," Elena searched her memory and didn't recall which Hogwarts professor had this hobby.
.....
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