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Koyo Gakuin Junior High School Past Problems


Of the money that a person had, he first spent 300 yen and then spent 5/12 of the remaining money. Then, 50 yen more than half of the money I had at the beginning remained. How much money did this person spend in total?

Arithmetic answer

1300 yen


Let ⑫ be the money left after spending 300 yen out of the money you had at the beginning.
Since we are using 5/12 of the remaining money (⑫), that is, ⑤, the rest is ⑫-⑤ = ⑦.
Also, half of the money you had at the beginning will be ⑥ + 150 (yen).
The remaining money is 50 yen more than half of the money I had at the beginning, so
⑦ = (⑥ +150) +50

Since ① of ⑦-⑥ corresponds to 200 of 150 + 50, ① = 200 (yen)
Therefore, the total amount of money spent is 300 + 200 x 5 = 1300 yen.


A typhoon is a tropical cyclone with a maximum wind speed of 17 m / s or more near the center. What will happen to us around us with a wind of 17m / s?

Choose from the following and answer with a symbol.

ah. I feel the wind on my face. The leaves move.

I. Sand dust rises and the paper rises. The twigs move.
hare. The whole tree shakes. It's hard to walk in the wind.

workman. The trees are uprooted. I can't stand.

Science answer


national language

Q1 Please change the katakana characters on the sidelines a to d into kanji.

Galilei, who believed that Copernicus's heliocentric theory was correct, rather than the geocentric theory that was sent by the church, is brought to justice by the church.

・ ・ ・ ・ ・ ・

Ptolemy's b Taikei (Geocentric theory) is mathematically elaborate.

・ ・ ・ ・ ・ ・

You will be at a loss as to what c -jirei should be used to explain the heliocentric theory.

・ ・ ・ ・ ・ ・

When something burns, the phlogiston will duck into the air from itself.

Japanese answer

a promotion

b system

c Case

d diffusion

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