Subject :IMO Class : Class 6
How many right angles does the hour hand of a clock turn when it moves from 6 to 12?
A 1
B 2
C 3
D 4
It should be 4
Ans 1:
Class : Class 9
Answer is correct
Ans 2:
Class : Class 7
Answer should be D(4). 6 to 9, 7 to 10, 8 to 11, 9 to 12. Angle of each hour is 30 degree, so every 3 hours is a 90 degree.
Ans 3:
Class : Class 6
the answer should be 2
Ans 4:
Class : Class 8
answer is correct