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Q6. Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ?
A. 4
B. 10
C. 15
D. 16
Ans. D
Q7. The speed of a train is 90 kmph. What is the distance covered by it in 10 minutes?
A. 15 kmph
B. 12 kmph
C. 10 kmph
D. 5 kmph
Ans. A
Q8. In how many ways can the 7 letters A,B,C,D,E,F and G be arranged so that C and E never together.
A. 5040
B. 6480
C. 3600
D. 1440
Ans. C
Q9. Four different electronic devices make a beep after every 30 minutes, 1 hour, 3/2 hour and 1 hour 45 minutes respectively. All the devices beeped together at 12 noon. They will again beep together at:
A. 12 midnight
B. 3 a.m.
C. 6 a.m.
D. 9 a.m.
Ans. D
Q10. A car covers a distance of 624 km in 6 ½ hours. Find its speed?
A. 104 kmph
B. 140 kmph
C. 104 mph
D. 10.4 kmph
Ans. A