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The numbers are 55.5 and 44.5
let x = first number, y = second. x+y = 155 x-y = 11 add the two equations 2x= 166 x = 83 y = 72
-2.298 and -8.702 (to 3 dp)
2 x 3 x 5 x 7 = 210 and 7 + 11 + 89 + 103 = 210 The question did not state whether the four prime numbers were to be added, subtracted, multiplied, or combined by some other operation.
11