Question

the sum of ages of five persons before seven years is 56 and after four years what will the sum of their ages
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Answer 1

Answer:

$56 \times 5 \\ = 280 \\ after \: seven \: years \\ (7+4) \times 5 = 35 \\ = 11 \times 5 = 55 \\ then \: \: 55 + 280 =335 \: ans$