If the product of three consecutive numbers is 210, then the sum of the smaller numbers is = ?

Explanation:-

210 = 21 × 10 = 7 × 3 × 2 × 5
take 2 and 3 with together then we find number is 5, 6, 7 which is consecutive number
so, 1^st + 2^nd = 5 + 6 = 11