Math Quantitative Aptitude
Math Quantitative Aptitude
181. Six identical Cards are placed on a table. Each Card has number ‘1’ marked on one side and number ‘2’ marked on its other side. All the six cards are placed such that
the number ‘1’ is on the upper side. In one try, exactly four (neither more or less)
cards are turned upside down. In how many tries can the cards be turned upside down such that all the six cards show number ‘2’ on the upper side.
the number ‘1’ is on the upper side. In one try, exactly four (neither more or less)
cards are turned upside down. In how many tries can the cards be turned upside down such that all the six cards show number ‘2’ on the upper side.
- 3
- 5
- 7
- This cannot be achieved
182. A boy wrote successive whole numbers starting from 1 up to 900 in doing so how many times did he write the digit 7?
- 271
- 280
- 281
- None of these
183. A question booklet contains 100 questions for a test. A candidate gets 4 marks for every correct answer, loses 1 mark for every wrong answer, and no mark for a blank answer. Which one of’ the following sets of marks can be secured by three candidates?
- 396, 395, 394
- 393, 392, 391
- 392, 391, 390
- 389, 388, 387
184. Six singers are taking part in a music competition. There are 4 judges for the competition. How many comparisons does each judge make between all the singers to select the best among them ?
- 15
- 20
- 24
- 25