What should be added to 6715 to get 815?
Let x be added to 6715 to get 815 ⇒6715+x=815
⇒x=715−815
⇒x=9715−415
L.C.M. of 5 and 15 is 15
⇒x=9715−415×33
⇒x=9715−12315
⇒x=−2615
⇒x=−11115
Therefore, −11115 is the required number
(i) What should be subtracted from -2 to get38?(ii) What should be added to -2 to get 38?