Exam Preparation for Unique IDs
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Exam Preparation for Unique IDs
Sample questions with model answers
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If $2^{n-7} \times 5^{n-4} = 1250$, find the value of n.
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n = 10
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Simplify $\frac{3^5 \times 10^5 \times 2^5}{5^7 \times 6^5}$.
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Simplified form is $\frac{1}{5^2}$.
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Simplify $\frac{16 \times 2^{n+1} - 4 \times 2^n}{16 \times 2^{n+2} - 2 \times 2^{n+2}}$.
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Simplified form is $\frac{2^{n+1}}{2^{n+2}} = \frac{1}{2}$.
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(ii) Rajan has 7 shirts, 4 trousers and 3 pairs of shoes. In how many ways can he dress up?
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84 ways.
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