Question

avarege of 5 constetitve numbers a,b,c is 105 what is the product of b,c

Answer 1

let the first number be x

then all the consecutive numbers be x+1, x+2, x+3, x+4

their sum = 105 * 5 = 525

x+x+1+x+2+x+3+x+4 = 525

5x+10 = 525

5x = 515

x = 103

so next number is 104,105,106,107

product of b and c = 104 * 105 = 10920