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## Koyo Gakuin Junior High School Past Problems

arithmetic

## 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

<Explanation>

## 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.

Science

## 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

## hare.

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

## Click the book below to purchase

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