Quantitative Aptitude – Number System – The mean of all 4-digit even natural


Slot – 1 – Quantitative Aptitude – Number System – The mean of all 4-digit even natural


Q. The mean of all 4-digit even natural numbers of the form ‘aabb’, where a>0, is?
  1. 4864
  2. 5050
  3. 4466
  4. 5544

Answer: 5544

Solution :
1st 4 digit even number in aabb= 1100
Last digit even number in aabb= 9988
Mean of 4 digit even number= 1100 +9988
11088/2=5544


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