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Which number is equal to?


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Which is equal to 23 * 22 * 2-1?

A: 32

B: 4096

C: 16

D: 1296


Apr 6th, 2015

Answer:

C. 16

Note:

23 * 22 * 2-1  = 

2^3 * 2^2 * 2^-1  =  2^(3+2-1)

                            = 2^4

                            =  2  X  2  X  2  X  2

                            =  16

Apr 6th, 2015

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