Aptitude Tests 4 Me

Basic Numeracy/Quantitative Aptitude

29. Sterling Silver is 92.5% pure silver. How many grams of Sterling Silver must be mixed to a 90% Silver alloy to obtain a 500g of a 91% Silver alloy?

 (a) 100 grams (b) 150 grams (c) 200 grams (d) 250 grams

30. How many Kilograms of Pure water is to be added to 100 Kilograms of a 30% saline solution to make it a 10% saline solution.

 (a) 200 Kilograms (b) 250 Kilograms (c) 300 Kilograms (d) 400 Kilograms

31. A 50 ml after-shave lotion at 30% alcohol is mixed with 30 ml of pure water. What is the percentage of alcohol in the new solution?

 (a) 16.75% (b) 17.75% (c) 18.75% (d) 20.75%

32. You add x ml of a 25% alcohol solution to a 200 ml of a 10% alcohol solution to obtain another solution. Find the amount of alcohol in the final solution in terms of x. Find the ratio, in terms of x, of the alcohol in the final solution to the total amount of the solution. What do you think will happen if x is very large? Find x so that the final solution has a percentage of 15%.

 (a) 64 ml (b) 200 ml (c) 300 ml (d) 400 ml

33. What is the least positive integer that has the same number of positive factors as 175?

 (a) 8 (b) 10 (c) 12 (d) 16

TOTAL

Detailed Solution

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