Multiple choice questions I — task. Mathematics State Board, Class 10.

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1. If \(n(A \times B) = 6\) and \(A = \{1,3\}\), then \(n(B)\) is

\(3\)
\(2\)
\(6\)
\(1\)

2. If the ordered pairs \((a + 2, 4)\) and \((5, 2a + b)\) are equal, then \((a, b)\) is

\((5,1)\)
\((3,-2)\)
\((2,3)\)
\((2,-2)\)

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