Question

scrieti toate nr. de forma 7x2y divizibile cu : 4 ; 5 ; 9 ; 10


coronița va rog mult urgent

Answer 1

7x2y=7424,7425,7429,74210,7524,7525,7529,75210,7924,7925,7929,79210,71024,71025,71029,710210

Answer 2

Divizibile cu 5:
x={0,1,2,3,4,5,6,7,8,9}
y={0,5}
Divizibile cu 9:
7+x+2+y=9+x+y
x={8,7,6,5,4,3,2,1,0} =>ÎN ACEASTĂ ORDINE
y={1,2,3,4,5,6,7,8,9} =^
adică: 7821,7722,7623,7524,7425,7326,7227,7128,7029.
Divizibile cu 10:
x={1,2,3,4,5,6,7,8,9,0}
y={0}
Divizibile cu 4:
x={1,2,3,4,5,6,7,8,9,0}
y={0,4,8}