Lecția 2 – MULȚIMEA NUMERELOR NATURALE

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10. 10

1. Answered
2. Review

1. Question 1 of 10

   1. Question

   1 points
   $\overline{ab}=$

   • $10·a+b$
   • $10·b+a$
   • $10a·b$
   • $a+b$
   Correct
   

   Incorrect
   
2. Question 2 of 10

   2. Question

   1 points
   În calculul $\sqrt{16}+\sqrt{25}·25$ prima dată efectuăm

   • $\sqrt{16}și\sqrt{25}$
   • $\sqrt{16}+\sqrt{25}$
   • $25·25$
   • $\sqrt{16+25}$
   Correct
   

   Incorrect
   
3. Question 3 of 10

   3. Question

   1 points
   

   • $7^{38}$
   • $7^{18}$
   • 1
   • Nu are sens
   Correct
   

   Incorrect
   
4. Question 4 of 10

   4. Question

   1 points
   Rezultatul calculului 4+20:2 este egal cu

   • 14
   • 12
   • 10
   • 16
   Correct
   

   Incorrect
   
5. Question 5 of 10

   5. Question

   1 points
   Rezultatul calculului ${\left(\sqrt{2^4}\right)}^2+\sqrt{2}·\sqrt{4}·\sqrt{8}$ este egal cu

   • $2^4+8$
   • $2^4+2^2$
   • $2^4+\sqrt{2·2^2·2^3}=2^4+\sqrt{2^5}$
   • $2^8+8$
   Correct
   

   Incorrect
   
6. Question 6 of 10

   6. Question

   1 points
   Pătratul lui 4 este

   • $4^2$
   • $4^4$
   • $4^3$
   • 8
   Correct
   

   Incorrect
   
7. Question 7 of 10

   7. Question

   1 points
   Cel mai mare număr par de forma $\overline{abc}$ cu cifre diferite este

   • 864
   • 986
   • 987
   • 999
   Correct
   

   Incorrect
   
8. Question 8 of 10

   8. Question

   1 points
   Dând factor comun în expresia   $23·12-12·6$, obținem

   • $12(23-6)$
   • 23(12-6)
   • 128
   • $12(23+6)$
   Correct
   

   Incorrect
   
9. Question 9 of 10

   9. Question

   1 points
   Rezultatul calculului $0^1+1^2+2^3$ este egal cu

   • 11
   • $3^6$
   • 9
   • 8
   Correct
   

   Incorrect
   
10. Question 10 of 10

    10. Question

    1 points
    Triplul numărului $3^{33}$ este egal cu

    • $9^{33}$
    • $3^{34}$
    • $3^{66}$
    • $3^{99}$
    Correct
    

    Incorrect