Real Numbers Test

Real Numbers

This is Real Numbers Test-01 for CBSE class 10 Maths.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
A number when divided by 61 gives 27 as quotient and 32 as remainder, then the number is:
  • A
    1796
  • B
    1679
    Correct
  • C
    1569
  • D
    1967
2
Every positive even integer is of the form ____ for some integer ‘q’.
  • A
    2q – 1
  • B
    none of these
  • C
    2q
    Correct
  • D
    2q + 1
3
Every positive odd integer is of the form ________ where ‘q’ is some integer.
  • A
    2q + 1
    Correct
  • B
    3q + 1
  • C
    5q + 1
  • D
    2q + 2
4
For any two positive integers a and b, there exist (unique) whole numbers q and r such that
  • A
    \( a{\text{ }} = {\text{ }}bq{\text{ }} + {\text{ }}r, 0 \leqslant r < b. \)
    Correct
  • B
    \( q{\text{ }} = {\text{ }}ar{\text{ }} + {\text{ }}b \) , \( 0 \leqslant r < b. \).
  • C
    none of these
  • D
    $b{\text{ }} = {\text{ }}aq{\text{ }} + {\text{ }}r$ , $0 \leqslant r < b.$
5
For any positive integer ‘a’ and 3, there exist unique integers ‘q’ and ‘r’ such that a = 3q + r where ‘r’ must satisfy
  • A
    0 < r < 3
  • B
    \(0 \leqslant r{\text{ }} < {\text{ }}3\)
    Correct
  • C
    \(0 < r{\text{ }} \leqslant {\text{ }}3\)
  • D
    1 < r < 3
6
If \(112 = q \times 6 + r,\) then the possible values of r are:
  • A
    2, 3, 5
  • B
    0, 1, 2, 3
  • C
    0, 1, 2, 3, 4, 5
    Correct
  • D
    1, 2, 3, 4
7
By Euclid’ division lemma \(x = qy + r,x > y,\) the value of \(q\) and \(r\) for \(x = 27\) and \(y = 5\) are:
  • A
    \(q = 5,r = 3\)
  • B
    \(q = 5,r = 2\)
    Correct
  • C
    cannot be determined
  • D
    \(q = 6,r = 3\)
8
Every positive odd integer is of the form 2q + 1, where ‘q’ is some
  • A
    none of these
  • B
    whole number
  • C
    natural number
  • D
    integer
    Correct
9
Any ____________ is of the form 4q + 1 or 4q + 3 for some integer ‘q’.
  • A
    positive even integer
  • B
    composite number
  • C
    prime number
  • D
    positive odd integer
    Correct
10
The product of three consecutive positive integers is divisible by
  • A
    4
  • B
    5
  • C
    6
    Correct
  • D
    10
11
The least number \(n\) so that \({5^n}\) is divisible by 3, where \(n\) is:
  • A
    a whole number
  • B
    a natural number
  • C
    a real number
  • D
    no natural number
    Correct
12
For every positive integer ‘n’, \({n^2} - n\) is divisible by
  • A
    6
  • B
    2
    Correct
  • C
    4
  • D
    8
13
For every natural number ‘n’, \({6^n}\) always ends with the digit
  • A
    6
    Correct
  • B
    0
  • C
    8
  • D
    4
14
If \({m^2}--{\text{ }}1\) is divisible by 8, then ‘m’ is
  • A
    a whole number
  • B
    an even integer
  • C
    an odd integer
    Correct
  • D
    a natural number
15
If two positive integers ‘m’ and ‘n’ can be expressed as \(m = {x^2}{y^5}\) and \(n = {x^3}{y^2}\),where ‘x’ and ‘y’ are prime numbers, then HCF(m, n) =
  • A
    \({x^2}{y^3}\)
  • B
    \({x^3}{y^2}\)
  • C
    \({x^3}{y^3}\)
  • D
    \({x^2}{y^2}\)
    Correct