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Which of the following is equal to 1?
  • a)
    20 + 30 + 4
  • b)
    20 × 30 × 40
  • c)
    (30 – 20) × 40
  • d)
    (30 – 20) × (30 + 20)
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which of the following is equal to 1?a)20+ 30+ 40b)20× 30×...
Concept used:
m0 = 1
Solution:
20 + 30 + 40 =1 + 1 + 1 = 3
20 × 30 × 40 = 1 x 1 x 1 = 1
(30 – 20) × 40 = (1 - 1) x 1 = 0 x 1 = 0
(30 – 20) × (30 + 20) = (1 - 1) x (1 + 1) = 0
Hence, the correct option is 2.
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Community Answer
Which of the following is equal to 1?a)20+ 30+ 40b)20× 30×...
None of the options are equal to 1.
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Which of the following is equal to 1?a)20+ 30+ 40b)20× 30× 40c)(30– 20) × 40d)(30– 20) × (30+ 20)Correct answer is option 'B'. Can you explain this answer?
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