Question
Powdery mildew disease is controlled by spray
ofÂSolution
Sulphur fungicides are commonly used to control powdery mildew, a fungal disease that affects a wide range of plants.
If  2,  7, 20,  x ,  110,  235,
Then,  7 x + 7√x = ?
150 160 140 ? 130 180
...2 3 3 ? 49 254
...? + (55)2 = (140)2 – (80)2 – 6278
36, 49, 23, 62, ?, 75
4                14                  130                     512                �...
96Â Â Â 111Â Â Â 131Â Â Â ? Â Â Â Â Â 186Â Â Â Â 221
Four terms are in proportion. The first, second and fourth terms are 4, 22, and 33. Find the third term.
6000 3002 1503 ? 378.75 191.375 97.6875
...15 , 33 , 71 , 150 , 307 , 625