JEE, NEET, Foundation & CBSE

After deducting 60% from a certain number and then deducting 15% from the remainder, 1428 is left. What was the initial number?
  1. 4200
  2. 3962
  3. 4150
  4. 4300
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If a + b + c = 27, then what is the value of (a – 7)3 + (b – 9)3 + (c – 11)3 – 3(a – 7)(b – 9)(c – 11)?
  1. 0
  2. 81
  3. 27
  4. 36
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