Find the product of the given number by suitable rearrangement.
125 × 40× 8 × 25

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1000

10000

100000

1000000

answer is D.

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Detailed Solution

Concept- Here, the merchandise is solved by continuous multiplication of every number step by step.
Step 1- Within the beginning, making pairs of the given numbers
             = 125 × 40× 8 × 25
             = ( 125 × 8 ) × ( 40× 25 ) Step 2- Now, inside the brackets
           = (125 × (4× 2)) × ((10 × 4) × 25)
           = ((125 × 4 )× 2) × (10× ( 4 × 25))
           = ((500)× 2 ) × (10× (100))
           = (1000)×(1000)
           = 1000000
The product is 1000000.
Hence, the correct answer is option 4) 1000000

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