Question Bank • QB_GA_ADV_130 NAT • 1 Mark

Section 8: General Aptitude

Analytical & Spatial Aptitude

Subtopic: Logic Deduction & Pattern Recognition

Question Statement:

At an annual conference of agricultural engineers, each of the $16$ participating department heads shakes hands with every other department head exactly once. What is the total number of handshakes exchanged? ________ (answer in integer).

Answer Key:

120

Step-by-Step Solution & Explanation

**Method 1: Combinations Formula** $\text{Total Handshakes} = \binom{n}{2} = \frac{n(n - 1)}{2} = \frac{16 \times 15}{2} = 8 \times 15 = 120$ Integer answer: 120.
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