a , b , c and d are 4 consecutive numbers . if the sum of a and dis 109 , what is the product of b and c ?
c 2970 here d = a + 3 a + a + 3 = 109 2 a = 106 a = 53 so , numbers are 53 , 54 , 55 and 56 ∴ b × c = 54 × 55 = 2970
multiply(add(divide(subtract(109, subtract(4, const_1)), const_2), const_1), add(add(divide(subtract(109, subtract(4, const_1)), const_2), const_1), const_1))