Class X

HCF of 84 and 270 is
  1. 2
  2. 1
  3. 6
  4. 8
How many prime factors are there in prime factorisation of 5005 ?
  1. 2
  2. 4
  3. 6
  4. 7
Every positive odd integer is of the form ________ where ‘q’ is some integer.
  1. 2q + 1
  2. 2q – 1
  3. 2q
  4. None of these
If p, q are two consecutive natural numbers, then HCF(p, q) is:
  1. q
  2. p
  3. 1
  4. qp
Which of the following is not an irrational number ?
  1. 5 - √3
  2. 5 + √3
  3. 4 + √2
  4. 5 + √9
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