Bodhak competitive bank exams clocks in this chapter we will discuss CLOCKS. We will see how o solve through equations and through shortcut methods
competitive bank exams clocks
Four type of Questions in Clocks.
1.Coincide or together =0
2.Right angle or Perpendicular=90
4.How to find out an angle
Formula to solve the clock problems
If the hands of the clock are :
perpendicular in 15-minute spaces apart
in a straight line and opposite to each other in 30-minute spaces apart.
in a straight line when they coincide or opposite to each other.
perpendicular to each other for 22 times in 12 hours and for 44 times in a day.
opposite to each other for 11 times in 12 hours and 22 times in a day.
The hands of the clock coincide with each other for 11 times in 12 hours and 22 times per day
The hands of the clock are 44 times in a straight line per day.
The minute hand gains 55 minutes over hour hand per hour.
There are four models in clocks
1: Coincide / together
2: Right angle / Perpendicular
4: Find out angle
At what time between 3 and 4 both the hands are coincided to each other
Shortcut Method :
We can solve the above problem without using the formula(To save time).
At time 3 degrees clock minute hand at 12 & hour hand at 3.
For coincide both the hands, the minute hand will have to move from 12 to 3 so it will take 15 minutes.
Answer is = 15(15/11) = 16(4/11)
Here 15>11 so divide the 15/11 the quotient is 1. reminder is 4. add the quotient to 15 i.e 15+1=16