Sunday, October 16, 2011

New trial spm exam question for 2011 can be downloaded from

Saturday, October 16, 2010

2010 SPM trial

Trial SPM question

Thursday, November 26, 2009

A Question of Time - Solution

Say answer is "8 hour X minute". According as proposition, the angle between the minute hand and "mark 4" of the watch is equal to the angle between the hour hand and "mark 8" of the watch.

We know in 60 minutes the minute hand makes 360 degrees (360/60=6 degrees per minute) and the hour hand makes 360/12=30 degrees (30/60=1/2 degrees per minute).

Therefore, (20-X) minutes corresponds to 6(20-X) degrees (this is the angle between the minute hand and "mark 4").

And in X minutes the hour hand makes X/2 degrees with "mark 8".

Thus, X/2=6(20-X) gives X=18 minutes 27 and 9/13 second.

So, the answer is 8 hour, 18 minutes, 27 9/13 second.

A Question of Time

The hour and minute hands are at equal distance from the 6 hour, what time will it be exactly?