Question

Cine rezolva fisa are coroana de la mine 5 stele și 32 de pcte

Answer 1

1.a)1+2+5+10=18

b)$D_{24} =${1, 2, 3, 4, 6, 8, 12, 24}

c)$M_{7}$={7, 14, 21, 28, 35, 42, 49}

d)$M_{11}$={33, 44, 55, 66}

e)Nr prime={17, 19, 23, 29, 31, 37}

f)Nr compuse={6, 8, 9, 10, 12, 14, 15, 16, 18}

2. a)124, 350, 528, 342, 260

b)147, 225, 528, 342, 111

c)124, 528, 260

d)350, 225, 260

e)225, 342

3.4+5=9

452, 454, 458

4.7a+3b=42

cu alte cuvinte:

7xa+3xb=42

3·b divizibil cu 7

b e divizibil cu 7

b e prim

b=7

7·a+3·7=42  

a+3=6

a=6-3

a=3

R: a=3; b=7

v: 7·3+3·7=42

5.1+2+3=6

2+3+4=9

3+4+5=12

4+5+6=15

5+6+7=18

6+7+8=21

7+8+9=24

Deci A.