Question

If the product of four consecutive natural number are in AP is 840 find the natural number

Answer 1

let the natural nos. be x,x+1,x+2,x+3
a.t.q.
x+x+1+x+2+x+3+x+4=840
5x+10=840
5x=840-10
5x=830
x=830/5
x=166