CBSE  /  Class 10  /  Maths  /  Real Numbers

  • 1. 
    If A = 2n + 13, B = n + 7 where n is a natural number then HCF of A and B

  • 2
  • 1
  • 3
  • 4

  • 2. 
    (-1)n + (-1)8n = 0 when n is

  • any positive integer
  • any odd natural number
  • any even numeral number
  • any negative integer

  • 3. 
    If the LCM of 12 and 42 is 10 m + 4 then the value of m is

  • 50
  • 8
  • \(\frac{1}{5}\)
  • l

  • 4. 
    The decimal expansion of the rational number \(\frac{6243}{2^2×5^4}\)will terminate after

  • 4 places of decimal
  • 3 places of decimal
  • 2 places of decimal
  • 1 place of decimal

  • 5. 
    n² - 1 is divisible by 8, if n is

  • an integer
  • a natural number
  • an odd natural number
  • an even natural number

  • 6. 
    If n is a natural number, then exactly one of numbers n, n + 2 and n + 1 must be a multiple of

  • 2
  • 3
  • 5
  • 7

  • 7. 
    The rational number between 72 and 73 is

  • \(\frac{6}{5}\)
  • \(\frac{3}{4}\)
  • \(\frac{3}{2}\)
  • \(\frac{4}{5}\)

  • 8. 
    If a and 6 are two positive numbers and H and L are their HCF and LCM respectively. Then

  • a × b = H × L
  • a = b × H
  • \(\frac{b×L}{H}\)
  • \(\frac{L}{a×b}\)

  • 9. 
    LCM of 2³ × 3² and 2² × 3³ is

  • 2³
  • 3³
  • 2³ × 3³
  • 2² × 3²

  • 10. 
    The LCM of 2.5, 0.5 and 0.175 is

  • 2.5
  • 5
  • 7.5
  • 0.875
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