
8B elev 1
Quiz
•
Computers
•
8th Grade
•
Practice Problem
•
Hard
Alexandru Maria-Antonia
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6 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
-2023
-1
3
-2020
Answer explanation
To solve the expression, follow the order of operations: 16 ÷ 8 = 2, 2 x 2 = 4, 0^3 = 0, (-1)^2023 = -1. Therefore, the result is 4 - 0 + (-1) = 3.
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
93
100
278
301
Answer explanation
To find x, cross multiply: 5 * 111 = 3 * (2x - 1). Solve for x: 555 = 6x - 3. x = 93, which is the correct answer.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Produsul dintre cel mai mic element negativ și cel mai mare element negativ al mulțimii A={-6, -3, -2, 0, 1, 2, 3, 4} este egal cu:
12
13
9
2
Answer explanation
The product of the smallest negative element (-6) and the largest negative element (-2) in the set A is 12, making the correct answer 12.
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Scrierea fracției zecimale 0,1(6) sub formă de fracție ordinară este:
Answer explanation
Pentru a transforma 0,1(6) in fractie ordinara, putem scrie x = 0,1(6) si inmultim cu 10 pentru a elimina zecimalele: 10x = 1,6(6). Scadem x din 10x pentru a elimina partea zecimala repetata: 9x = 1,6. Astfel, x = 16/90.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Andrei
Barbu
Călin
Dan
Answer explanation
Barbu a calculat corect media geometrică a numerelor a și b, conform rezultatelor din tabel.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Ioana are 14 ani iar fratele ei are cu 10 ani mai puțin. Ioana afirmă: Peste un an, vârsta mea va fi de trei ori mai mare decât vârsta fratelui meu.
Afirmația ei este :
Adevărată
Falsă
Answer explanation
Ioana are 14 ani, iar fratele ei are 4 ani. Peste un an, Ioana va avea 15 ani, iar fratele ei va avea 5 ani. 15 este de 3 ori mai mare decât 5, deci afirmația ei este adevărată.
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