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CBSE Questions for Class 6 Maths Playing With Numbers Quiz 5 - MCQExams.com

What is the value of x for which x,x+1,x+3 are all prime numbers?
  • 0
  • 1
  • 2
  • 101
The smallest 3 digit prime number is:
  • 101
  • 103
  • 109
  • 113
Which of the following number is a prime?
  • 667
  • 861
  • 481
  • 331
Which of the following is a prime number?
  • 33
  • 81
  • 93
  • 97
Consider the following numbers.
247
203
Which of the above number is/are prime?
  • 1 only
  • 2 only
  • Both 1 and 2
  • Neither 1 nor 2
Which one of the following is a prime number?
  • 184
  • 171
  • 173
  • 221
Which one of the following is not a prime number?
  • 31
  • 61
  • 71
  • 91
Find HCF by finding factors:
16 and 56.
  • 6
  • 18
  • 8
  • 9
Find HCF of 66 and 88.
  • 21
  • 23
  • 24
  • 22
Find HCF of 54, 81 and 99.
  • 8
  • 9
  • 10
  • 11
HCF of two co-prime number is _______.
  • 1
  • 0
  • 2
  • None of these
HCF of two or more prime numbers is  ___________.
  • 0
  • 2
  • 4
  • 1
Which of the following numbers is prime?
  • 119
  • 187
  • 247
  • 179
( 7 \times 11 \times 13 + 13 ) is a/an
  • Composite number
  • Prime number
  • Irrational number
  • Imaginary number.
The co-prime numbers from the following pairs, are ______.
  • 7 and 63
  • 36 and 25
  • 35 and 29
  • 63 and 81
G.C.D of 4 and 19 is _________.
  • 1
  • 4
  • 19
  • 76
The reciprocal of the smallest prime number is _______.
  • 0
  • \dfrac {1}{2}
  • 1
  • 2
Which of the following is not a prime number?
  • 23
  • 29
  • 43
  • 21
The number 111111111 is a
  • Prime number
  • Composite number
  • Divisible by \frac{10^7-1}{9}
  • None of these
Which of the following numbers are co-prime?
a) 18 and 35 
b) 15 and 37 
c) 30 and 415
d) 17 and 68
e) 216 and 215
f) 81 and 16
  • a,b and f
  • a,b,e and f
  • ab,c and f
  • b,d and f
The total number of factors for 50 are
  • 16
  • 6
  • 4
  • 10
How many two-digit prime numbers are there having the digit 3 in their units place?
  • 10
  • 8
  • 6
  • 5
The factor of 252 is:
  • 2
  • 5
  • 11
  • 10
A number is divisible by 9, if the sum of the digits of the number is divisible by _______ .
  • 3
  • 9
  • 6
  • 2
A student was asked to find the sum of all the prime numbers between 10 and 40.He found the sum as 180.Which of the following statements is true?
  • He missed one prime number between 10 and 20
  • He missed one prime number between 20 and 30
  • He added one extra prime number between 10 and 20
  • None of these
Which of the following is divisible by 9?
  • 75636
  • 89321
  • 75637
  • 75632
Which of the following number is divisible by 6?
  • 3792
  • 5634
  • 9832
  • 3684
The sum of prime numbers, out of the numbers 17, 8, 21, 13, 41, 2, 27, 31, 51 is:
  • 125
  • 102
  • 104
  • 155
Which of the following numbers is divisible by 9?
  • 8576901
  • 96345210
  • 67594310
  • none of these
Which of the following numbers is divisible by 9
  • 972063
  • 730542
  • 785423
  • 561284
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