plusing 5 up to 160. 2 times

5 + 5 = 10

10 + 10 = 20

20 + 20 = 40 

40 + 40 = 80

80 + 80 = 160

5 + 5 = 10 

10 + 10 = 20

20 + 20 = 40 

40 + 40 = 80

80 + 80 = 160

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