爺爺比姑姑大 30 歲,當姑姑 10 歲時,爺爺是幾歲?

年齡問題

Quiz
•
Mathematics
•
6th Grade
•
Hard
翁昆漢 翁昆漢
Used 1+ times
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12 questions
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1.
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2 mins • 1 pt
2.
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2 mins • 1 pt
小儒和嬸嬸相差 30 歲,當嬸嬸的年齡是小儒的 3 倍時,小儒A歲和嬸嬸B歲。
Answer explanation
小儒:30÷(3-1)=15
嬸嬸:15×3=45
答:小儒 15 歲;嬸嬸 45 歲
3.
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2 mins • 1 pt
叔叔今年 33 歲,小騰今年 15 歲,幾年前,叔叔的年齡是小騰的 4 倍?
Answer explanation
1.33-15=18
18÷(4-1)=6
15-6=9
6×4=24
4.
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2 mins • 1 pt
爸爸 30 歲時,小琪 2 歲,過了幾年,爸爸的年齡才剛好是小琪的 3 倍
Answer explanation
30-2=28
28÷(3-1)=14
14×3=42
5.
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2 mins • 1 pt
奶奶今年 68 歲,哥哥今年 20 歲。
幾年前,奶奶的年齡是哥哥的 4 倍?
Answer explanation
1. 68-20=48
48÷(4-1)=16
20-16=4
答:4 年前
6.
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2 mins • 1 pt
奶奶今年 68 歲,哥哥今年 20 歲。
幾年後,奶奶的年齡是哥哥的 3 倍?
Answer explanation
48÷(3-1)=24
24-20=4
答:4 年後
7.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
爺爺今年 51 歲,爸爸今年 30 歲,弟弟今年 6 幾年前,爺爺的年齡是爸爸的 8 倍?
Answer explanation
1. 51-30=21
21÷(8-1)=3
30-3=27
答:27 年前
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