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Last "Weekly Quiz"

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This week’s problem:  

 On the figure AC = BC. The angle CBD is 125°.

 How great is the angle ACB?

 Choose one of these answer alternatives:

A: 50°     B: 55°     C: 60°     D: 65°     E: 70°

(Please note: The illustration is not accurate, so it will not help much to try and measure the angle on the figure.)

   

 

Correct answer:   E   (70°)

Last week's problem had been made by:
Roald Buvig
 Project manager of the KappAbel competition

The lucky winners last week are: 

1. prize
  KappAbel sweather:
Corinna E. Christiansen
NO-1718 GREÅKER

2. prize
  Phone card from Telenor Mobil:
Martin Torvanger
NO-6987 BULANDET
Winner of 2nd prize with address outside Norway will receive a KappAbel sweather instead of a Norwegian phone card.

3. prize
  Numisletter
commemorating the 200th birthday of the great Norwegian Mathematician 
Niels Henrik Abel:
 Monika Øksnes
NO-5943 AUSTRHEIM

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