Online Activities, Educational Games, Quizzes, Crossword Maker

Make educational games, websites, online activities, quizzes and crosswords with Kubbu e-learning tool for teachers


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V. ...Pregatire concurs 3

1. Cate dintre numerele 12,16,36,42,49,112,121,136,169,422,442,625 sunt patrate perfecte?
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2. Cate numere naturale pare de cel mult trei cifre se pot forma folosind cifrele 7,0,2 ?
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3. Se considera multimea A = { x є N │x - 10 є N* si 400 - x є N* }. Atunci multimea A are # elemente.
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4. Se considera multimea A = { x є N │x - 8 є N* si 211 - x є N* }. Atunci cel mai mic element al multimii A este . # .
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5. Daca x² : 2² = 3², atunci x = # .
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6. Daca M={1,2,3} atunci M are # submultimi.
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7. In sirul 3, 6, 9, 12, ,,, al 10-lea termen este # .
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8. Daca 1%2b 3 %2b 5 %2b ... %2b 51 = n² , atunci n = # .
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