
Contrarellotge matemàtica
Authored by Nuria Margalef
Mathematics
12th Grade
Used 5+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
3P. Si x=3, quina opció representa un valor més gran?
2x
x2
(x+1)(x-1)
2x
x + 4
2.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
3P. Quin és el resultat de la següent operació?
2 ⋅ (2 ⋅ (2 ⋅ (2−1)−1)−1)−1=?
-2
-1
0
1
2
3.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
P3. Quin dels següents nombres és sempre senar per qualsevol "n" enter?
2017·n
n5
n3 - 2017
n + 2017
2n2 + 2017
4.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
P3. Quan a València són les 11 de la nit, a Seattle són les 2 de migdia.
Quina hora és a València quan a Seattle són les 11 de la nit?
8 del matí
8 de la tarda
2 del migdia
2 de la matinada
migdia
5.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
P3. Un amic et proposa que endivines un número de tres xifres, format pel 3, el 5 i el 7. Quants números diferents pots triar?
4
5
6
10
12
6.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
P3. Pintem les cares exteriors d'un cub de 6×6×6 format per petits cubs de 1×1×1. Quants cubs petits s'han quedat sense pintar?
125
152
64
61
98
7.
MULTIPLE CHOICE QUESTION
1 min • 3 pts
P3. Enguany ens ha deixat Raymond Smullyan, matemàtic americà autor de molts llibres de matemàtica recreativa. Vegem un dels deus problemes:
Un comerciant compra un ocell per 7€, i el ven poc després per 8€. El torna a comprar més endavant per 9€ i l'acaba venent per 10€. Quin benefici ha obtingut?
Cap: es queda igual
Cap: perd 1€
1 €
2 €
Cap de les altres respostes és correcta
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