This is a sum and difference problem, with the equations
R-N=35
R+N=635
The solution of which is
R=(635+35)/2=335
N=(635-35)/2=300
In general, the sum and difference problem can be solved (most of the time mentally) using
Larger number = (sum + difference)/2
Smaller number = (sum - difference)/2
Answer is in a photo. I can only upload it to a file hosting service. link below!

Answer:
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Step-by-step explanation:
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Answer:
105°
Step-by-step explanation:
We are supposed to find the angle between the hour hand and the minute hand at a time of 2:30 in a 12 hour analog clock.
So, we have 12 segments in a clock , each segment corresponding to an hour.
Angle of each segment would be :-

At 2:30 the minute hand will be facing 6 hour direction and the hour hand between hours 2 and 3.
So the angle between them would be

So the angle between the hour and the minute hand at time 2:30 is 105°.