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Let be the first number x then second (185 – x). By formula, ⇒ 1700 × 5 = x (185 – x) ⇒ 8500 = 185x – x2 ⇒ x2 – 185x + 8500 = 0 ⇒ x2 – 100x – 85x + 8500 = 0 ⇒ x(x – 100) – 85(x – 100) = 0 ⇒ x = 100, x = 85 So first number 85 and second number 100. ∴ The difference between two numbers = 100 – 85 = 15
120, 125, 140, 165, 210, 245
2, 4, 16, 48, 240, 1440, 10080
5, 13, 41, 185, 1111, 8149
Find the wrong number in given number series.
2556, 2613, 2734, 2841, 3012, 3221
-2, 0, 8, 32, 64, 66
171, 86, 87, 132, 266, 668
1, 18, 44, 81, 131, 198
123, 155, 198, 246, 301, 363