Question
A 320 litres mixture contains milk and water in the
ratio 3:1 respectively. If 30% of the mixture is replaced with the same quantity of water, then find the quantity of water in the new mixture.Solution
Quantity of water in the mixture initially = 320 × (1/4) = 80 litres Quantity of water removed = 80 × 0.3 = 24 litres Quantity of water added = 320 × 0.3 = 96 litres Quantity of water in the new mixture = 80 – 24 + 96 = 152 litres
230 192 172 ? 122 100
...What value should come in the place of (?) in the following number series?
64, 80, 104, ?, 176, 224
97, 106, ?, 195, 411, 460
What will come in place of the question mark (?) in the following series?
29, 42, ?, 95, 135, 184
Find the missing term:
2, 6, 15, 31, 56, ?
32   48   96   ?   720   2520
82, 98, 130, 178, 242, ?
4 10 ? 62.5 156.25 390.625
...140, 146, 170, 224, ?, 470
7 47 ? 223 359 527
...