Which one of the following is not a prime number?
Correct answer D. 91
Tip: press A, B, C or D to answer, and N for the next question.
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See allA train 110 meters long passes a telegraph pole in 3 seconds. How long will it take to cross a platform 165 meters long?
Correct answer C. 7
Two trains travel in the same direction at 50 and 32 km/h. A man in slower train observes that the faster train passes him in 15 seconds. The length of faster train is?
Correct answer A. 75m
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If 1 is and even integer and 31 24 then 1 =?
Correct answer D. none
If p is an odd integer and 7p > 50 and 3p < 35 then p is?
Correct answer A. 9
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