MathsJEE Main 5 Apr 2026, Shift 2·Q21·Numerical·Moderate

Sets, Relations & Functions · Counting elements of a relation

Let

A = \{1, 4, 7\}

and

B = \{2, 3, 8\}

. Then the number of elements, in the relation

R = \{((a_1, b_1), (a_2, b_2)) \in ((A \times B) \times (A \times B)) : a_1 + b_2 \text{ divides } a_2 + b_1\}

is .

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