Question
If (4x + 3y): (28x - y) = 1: 5, then what is the value
of (3x 2 Â + 4y 2 ): (7x 2 Â + 2y 2 )?Solution
(4x + 3y): (28x - y) = 1: 5
5(4x + 3y) = 28x - y
20x + 15y = 28x - y
x = 2y
Now, (3x 2 Â + 4y 2 ): (7x 2 Â + 2y 2 )
= (3 * (2y) 2 Â + 4y 2 ): (7 * (2y) 2 Â + 2y 2 ) =Â 8: 15
79, 248, ?, 225, 125, 206
840, 2520, 630, 3150, ?, 3675
7, 8, ?, 52, 209, 1046
70, 95, 145, ?, 320, 445
123, 122, 114, 87, ?, -102
24 36 72 108 216 ?
- What will come in place of the question mark (?) in the following series?
24, 35, 57, 90, 134, ? What value should come in the place of (?) in the following number series?
24, 45, 133, 531, 2655, ?
What value should come in the place of (?) in the following number series?
1.5, 2.5, 4, 6, ?, 11.5
1024, 256, 768, 192, 576, 144, ?