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Question

23×25 is equal to_______.


A
28
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B
22
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C
22
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D
128
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Solution

The correct options are
A 28
D 128
By using law of exponent:
am×an=am+n, here a is called base and m,n are called powers. If base is same then powers are added together.
23×25=28
Also same number can be expressed in different form that is,
23×25=(12×12×12)×(12×12×12×12×12)
=12×12×12×12×12×12×12×12
=128(by using above law) 
 

Mathematics

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