At 6′o a clock ticks 6 times. The time between first and last ticks is 25 seconds. How long does it tick at 12′o clock
Options:
A) 47	B) 55	C) 28	D) 66	E) 11
Explanation:   For ticking 6 times, there are 5 intervals.   Each interval has time duration of   25/5= 
<gadget id="calculator">  25/5</gadget>
<output>5</output>
5 secs   At 12 o'clock, there are 11 intervals,   So total time for 11 intervals= 11 × 5 = 55 secs.   Answer: 55
<result>B</result>
At 6′o a clock ticks 6 times. The time between first and last ticks is 25 seconds. How long does it tick at 12′o clock