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Which of the following is equal to 1 ?
$$\frac{(0.11)^{2}}{(1.1)^{2}\times0.1}$$
$$\frac{(1.1)^{2}}{11^{2}\times(0.01)^{2}}$$
$$\frac{(0.011)^{2}}{1.1^{2}\times(0.01)^{2}}$$
$$\frac{(0.11)^{2}}{11^{2}\times0.01}$$
Let's look at Option 3
$$\frac{0.011\times\ 0.011}{1.21\times\ 0.01\times\ 0.01}=\frac{11\times\ 11\times\ 100}{100\times\ 121}$$
We can clearly see that on simplification that this will give 1. Hence this is the answer
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