a, b, c and d are four consecutive numbers. If the sum of a and dis 105, what is the product of b and c?
Choose the correct option:  A) 2756  B) 2578  C) 2534  D) 3354  E) 4234
2756   Here d = a + 3   a + a + 3 = 105   2a = 102   a = 51   So, numbers are 51, 52, 53 and 54   ∴ b × c= 52 × 53 = 2756
<result>A</result>
a, b, c and d are four consecutive numbers. If the sum of a and dis 105, what is the product of b and c?