I. 7x² + 27x + 18 = 0
II. 19y² - 27y + 8 = 0
I. 7x² + 27x + 18 = 0 7x² + 21x + 6 x + 18 = 0 7x(x + 3) + 6 (x + 3) = 0 (7x + 6) (x + 3) = 0 x = -6/7 , - 3 II. 19y² - 27y + 8 = 0 19y² - 19y - 8 y + 8 = 0 19y(y – 1) – 8(y – 1) = 0 (y – 1)(19 y – 8) = 0 y = 1, 8/19 Hence, x < y
174 180 198 252 414 910
1152 3456 432 1296 164 486
In each of the following giving number series, a wrong number is given. Find out the wrong number?
3023, 3132, 3246, 3356, 3471
2304 6912 864 2592 322 972
13 74 355 1416 4245
21 32 54 86 131 186
...150, 900, 300, 1800, 600, 3700, 1200
1, 1.5, 3, 7.5, 22.5, 75, 315
25 26 28 32 42 56
80, 88, 101, 122, 150, 185