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Data Sufficiency
by RUPALI GOYAL - Sunday, 1 March 2015, 04:58 PM
  Three professors A, B and C are separately given three sets of numbers to add. They were expected to find the answers to 1 + 1, 1 + 1 + 2, and 1 + 1 respectively. Their respective answers were 3, 3 and 2. How many of the professors are mathematicians.

A. A mathematician can never add two numbers correctly, but can always add three numbers correctly.

B. When a mathematician makes a mistake in a sum, the error is + 1 or -1.

options:

1. only A is mathematician
2. data not sufficient
3. A and B are mathematicians
4. None of above
Re: Data Sufficiency
by srikanth attili - Saturday, 13 June 2015, 03:41 PM
  i think its 4-nonesmile
Re: Data Sufficiency
by sumit garg - Friday, 26 June 2015, 06:33 PM
  1 (only A is mathematician)
Re: Data Sufficiency
by hitesh patil - Friday, 4 September 2015, 12:09 AM
  3.A and B are mathematicians