what numbers go in the blank 1,15,_,43,57,_,85,99

this is for homework and i think it is really hard i dont know the answer
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1 Answer

1,15,29,43,57,71,85,99

1+14=15

15+14=29

29+14=43

43+14=57

57+14=71

71+14=85

...
by Level 3 User (4.1k points)

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