What should come in place of the question mark (?) in the following questions :

80.4  x 41.6 x 21.6=?

  1. 81
  2. 64
  3. 84
  4. 28
Anurag Mishra Professor Asked on 11th January 2016 in Maths.
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1 Answer(s)

Answer: (2) 64

Solution:-
80.4 x 41.6 x 21.6
 = (23)0.4 x (22)1.6 x 21.6
 = 21.2 x 23.2 x 21.6
 = 26
 = 2 x 2 x 2 x 2 x 2 x 2
 = 64

Then, the value of 80.4 x 41.6 x 21.6 is 64.

Hence, the correct answer is option (2) 64.

Anurag Mishra Professor Answered on 12th January 2016.
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