Average calculation

These are the different type of questions asked from this topic.


Type 1:  Find the time when the angle between the two hands are given.

Type 2:  Find the angle between the 2 hands when the time is given.

Type 3:  Find the time, when clocks gaining/losing time.

Type 4:  Find the time in the mirror image.


ക്ലോകിലെ ഓരോ അക്കങ്ങൾക്കിടയിലെ കോണളവ്= 30°.
മിനിറ്റ് സൂചി ഓരോ മിനുറ്റിലും 6° ചുറ്റും.
മണിക്കൂർ സൂചി ഒരു മിനുറ്റിൽ ½°ചുറ്റും.
ഒരുദിവസം Hour, Minute സൂചികൾ 22 തവണ ഒന്നിന് മീതെ ഒന്നായി വരും.
ക്ലോകിലെ സൂ...

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Suppose there are n people in the party. The first person shakes hand with the other (n-1) guests. The second guest shakes hand with the other (n-2) guests. this will continue until the (n-1) th guest shakes hand with the nth guest.

Total number of handshakes is (n-1) + (n-2).. + 3 + 2 + 1. .

= ((n-1)(n))/2 .

For example, 6 people in a party shake hand with other guests. So how many handshakes will be there?.

=((6-1)(6))/2.

=15.

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The quickest way to calculate percentages is to multiply numbers first and handle two decimal places later.

For example, 20% of 70 is 20 x 70 = 1400, so the answer is 14. .

70% of 20 is also 14.

To calculate the percentage of 72 or 29, then round up and down to the nearest multiple (70 and 30 respectively) to get a quick approx result.

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