Dissolved oxygen (O₂) levels in water are critical for assessing organic pollution. The biochemical oxygen demand (BOD) test, which measures the amount of oxygen consumed by microorganisms in decomposing organic matter, is a key indicator of water quality and pollution levels.
24 72 180 360 540 ?
12 10 13 18.5 25.50 ...
Three series are given below. You have to find the values of P, Q and R, then establish a relationship among them.
I: 210, P , 233, 64...
19.11 × 5.98 + 20.03 × 3.12 – 34.95 + 97.9 × 3.02 =?
7 98 644 3145 12596 37797
...6000 3002 1503 ? 378.75 191.375 97.6875
...3 2 2 3 8 ?
...2, 9, 19, 32, 48, 67, ?
28 34 63 ? 769 3847
...61 71 86 ? 131 161
...
