Question
In an alloy of three metals, ratio of the quantity of
gold, silver and platinum is 5:6:8, respectively. If total quantity of silver and platinum together is 140 kg then find the difference between the quantity of silver and gold.Solution
Let the quantity of gold, silver and platinum be ‘5x’ kg, ‘6x’ kg and ‘8x’ kg, respectively. Total quantity of silver and platinum together = 140 kg 6x + 8x = 140 Or, x = 10 Difference between the quantity of silver and gold = {(6 – 5) × 10} = 10 kg
In each of the following series, one term is missing. Find the missing term.
1, 2, 6, 21, 88, ?
2Â Â Â Â Â 3Â Â Â Â Â Â 5 Â Â Â Â Â Â 9Â Â Â Â Â Â ? Â Â Â Â Â Â 33
...96 48 24 ? 6 3
...8, 9, 125, ?, 1331, 169Â
53 × 38 + 32 × âˆ›54872 = ?
150 Â Â Â 15Â Â Â 3Â Â Â ? Â Â Â Â 0.36Â Â Â Â 0.18
What should come in place of (?) question mark in the following number series.
256, 128, 64, 32, 16, ?
23, 27, 39, 59, ?, 123
80, 120, 30, 45, 9, 13.5, ?
24, 42, 60, ?, 96, 114
