The difference between two number is 200. x = smaller number y = larger number y - x = 200 larger nomber = y = 200+x One number is between 400 and 450. 400 < 200+x < 450 200 < x < 250 The other number is more than 200 but less than 210 200 < x < 210 smaller larger 201 401 202 402 203 403 204 404 205 405 206 406 207 407 208 408 209 409 Edwin