DELL Aptitude Questions

1. The list price of an article is Rs. 160 and a customer buys it for Rs. 122.40 after two successive discounts. If the first discount is 10%, then second discount is
• 12%
• 10%
• 14%
• 15%
2. In a school, 10% of number of girls is equal to 1/20 of number of boys. Ratio between the 'number of boys to number of girls is
• 1:2
• 2:1
• 1:4
• 4:1
3. The ratio of 252.5 : 53 is same as
• 5 : 3
• 5 : 6
• 1 : 25
• 25 : 1
4. If a, b, c, d, e are five consecutive odd numbers, their average is
• 5(a + 4)
• abde/5
• 5(a + b + c + d + e)
• a + 4
5. The average of 20 numbers is 15 and the average of first five is 12. The average of the rest is
• 16
• 15
• 14
• 13
6. A tradesman sold an article at a loss of 20%. If the selling price had been increased by Rs. 100, there would have been a gain of 5%. The cost price of the article (in Rs.) was
• 100
• 200
• 400
• 500
7. The price of an article is first decreased by20% and then increased by 30%. If the resulting price is Rs. 416, the original price of the article is
• Rs. 350
• Rs. 405
• Rs. 400
• Rs. 450
8. A man performs 2/15 of the total journey by train 9/20 by bus and the remaining 10 km on foot. His total journey in km is
• 15.6
• 24
• 16.4
• 12.8
9. By walking at 3/4 of his usual speed, a man reaches his office 20 minutes later than usual. His usual time is
• 30 min.
• 75 min.
• 90 min.
• 60 min.
10. If the compound interest on a certain sum for two years at 12% per annum is Rs. 2544 the simple interest on it at the same rate for 2 years will be
• Rs. 2400
• Rs. 2500
• Rs. 2480
• Rs. 2440