CAT Question of the Day Let a natural number n has the property that, n divides an – 1 for some integer a, then which of the following is true?
| OPTIONS | | |  | 1) | n2 always divides an – 1 for all prime number n | | | 2) | n2 does not divide an – 1 for some prime number n | | | 3) | n cannot be a composite number if n2 divides an – 1 | | | 4) | Both option 2 and option 3. |
Tip of the Day Your academic background is one of the key areas where interview questions can be asked. Review the key subjects in your area of graduation/specialization. Last year's Question of the day (21-Jan-12) Water in a canal, 30 decimetre wide and 12 decimetre deep, is flowing with a speed of 10 km/hour. Then, the area it will irrigate in 30 minutes, if 8 cm of standing water is required for irrigation is:
| OPTIONS | | | | | 1) | 225000 sq m | | | 2) | 22500 sq m | | | 3) | 225000 sq cm | | | 4) | 2250 sq m |
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