# Q.3.   Express each of the following numbers using exponential notation:         (i) 512    (ii) 343    (iii) 729    (iv) 3125

(i) 512

 2 512 2 256 2 128 2 64 2 32 2 16 2 8 2 4 2 2 1

$512=2\times 2\times2 \times2 \times 2\times 2\times2 \times 2\times 2=2^9$

(ii) 343

 7 343 7 49 7 7 1

$343=7\times 7\times 7=7^3$

(iii)729

 3 729 3 243 3 81 3 27 3 9 3 3 1

$729=3\times 3\times 3\times 3\times 3\times 3=3^6$

(iv)3125

 5 3125 5 625 5 125 5 25 5 5 1

$3125=5\times 5\times 5\times 5\times 5=5^5$

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