Multiple choice general knowledge math & puzzles

It was Kathleen's first day at school. The teacher said, "When you meet, please shake hands and introduce yourself by name."If there were 14 children in the class, how many total handshakes were there?

  1. 90

  2. 91

  3. 92

  4. 93
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a group where each person shakes hands with every other person exactly once, the total number of handshakes is n(n-1)/2. This is because each of the 14 children can shake hands with 13 others, but this counts each handshake twice (once for each participant), so we divide by 2: (14 × 13)/2 = 91.

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