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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