Question

STITUT

Descoperă regula si completează şirul:
a) 12, 17, 22,
c), 5, 10, 15;
b) 83, 74, 65,
d) , 3, 9, 27.
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Answer 1

a) 12+5=17; 17+5=22; 22+5=27....

b) 5+5=10; 10+5=15; 15+5=20....

c) 83-9=74; 74-9=65; 65-9=56....

d)3×3=9; 9×3=27; 27×3=81...