10th Standard CBSE - Maths - Real Number

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Question - 1

If x and y are odd positive integers then x2 + y2  is-

  • A even
  • B odd or even
  • C multiple of 2 and 4
  • D odd

Question - 2

What is the HCF of 161 and 303?

  • A 1
  • B 11
  • C 13
  • D 3

Question - 3

H.C.F. of two consecutive even numbers is:

  • A 1
  • B 4
  • C 2
  • D 0

Question - 4

6n is divisible by

  • A 2
  • B 3
  • C 5
  • D 2 and 3 both

Question - 5

For some integer ‘m’ every odd integer is of form

  • A 2m + 1
  • B m + 1
  • C 2 m
  • D m

Question - 6

Write the HCF of the smallest composite number and the smallest even number

  • A 4
  • B 1
  • C 2
  • D 0

Question - 7

The largest number that divides 460 and 50 leaving remainder 5 in the first case and 8 in the second case is

  • A 12
  • B 2
  • C 17
  • D 7

Question - 8

HCF of the smallest composite number and the smallest prime number is

  • A 0
  • B 4
  • C 2
  • D 1

Question - 9

If n is a positive integer , then n2 – n is always

  • A multiple of 2 and 4
  • B odd or even
  • C odd
  • D even

Question - 10

If the HCF of 85 and 153 is expressible in the form 85n – 153, then value of n is :

  • A 4
  • B 2
  • C 3
  • D 1
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