
Mathematics Challenge for Grade 9
Authored by κωνσταντινος ΑΡΛΕΤΗ
Mathematics
9th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ποια είναι η τιμή του x στην εξίσωση 2x + 3 = 11;
5
2
7
4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Υπολογίστε την επιφάνεια ενός τριγώνου με βάση 10 εκ. και ύψος 5 εκ.
30 εκ²
25 εκ²
15 εκ²
20 εκ²
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Αν η αναλογία αγοριών προς κορίτσια σε μια τάξη είναι 3:4, ποιο ποσοστό της τάξης είναι αγόρια;
3/7
1/2
4/7
2/5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Λύστε για το y: 3y - 7 = 2y + 5.
15
5
10
12
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the Pythagorean theorem?
In a right triangle, a² + b² = c².
In a right triangle, a² + b² = 2c².
In a right triangle, a² - b² = c².
In any triangle, a + b = c.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Βρείτε την κλίση της γραμμής που περνάει από τα σημεία (2, 3) και (4, 7).
2
1
3
4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Αν ένας κύκλος έχει ακτίνα 7 εκ., ποια είναι η περιφέρειά του; (Χρησιμοποιήστε π ≈ 3.14)
45.50 εκ.
43.96 εκ.
42.00 εκ.
44.00 εκ.
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