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Average of numbers = (a + b)/2 = 20 a + b = 40 ...(I) square root of these numbers = √ ab = 16 squaring both sides ab = 256 a – b =? So now – (a + b)2 = (a- b)2 + 4ab (40)2 – 4 ×256 = (a-b)2 (a-b)2 =1600- 1024 = 576 a – b = 24
129, 160, 224, ?, 459, 634
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