Answer:
343
Step-by-step explanation:
Big brain calculator work
28 + 35 + 42 + 49 + 56 + 63 + 70 = 343
28+35+42+49+56+63+70 We are asked to find the sum, so we add all the numbers in the series.
28+35+42+49+56+63+70 = 343
