CBSE Questions for Class 6 Maths Playing With Numbers Quiz 7 - MCQExams.com

Example for co-prime numbers is
  • $$25, 14$$
  • $$18, 16$$
  • $$9, 18$$
  • $$11, 77$$
State whether true or false:
If a number is divisible by 9, it must be divisible by 3.
  • True
  • False
Which number is divisible by  $$6$$ ?
  • $$213$$
  • $$468$$
  • $$621$$
  • None of these
State whether true or false:
If a number is divisible by 4, it must be divisible by 8.
  • True
  • False
Which of the following number is divisible by 8?
  • 23, 624
  • 39, 126
  • 1,20,458
  • None of these
Find the number of factors of $$512$$.
  • $$8$$
  • $$10$$
  • $$4$$
  • $$14$$
The number $$10$$ has four factors: $$1,2, 5$$ and $$10$$. The table below lists the number of factors for some numbers
NumbersNumber of factors
$$21$$$$4$$
$$23$$$$2$$
$$25$$$$3$$
$$27$$$$4$$
$$29$$$$2$$
From this, we can say that the number of prime numbers between $$20$$ and $$30$$ is:
  • $$0$$
  • $$2$$
  • $$3$$
  • $$4$$
State true or false:
If a number is divisible by $$3$$, it must be divisible by $$9$$.
  • True
  • False
State whether true or false:
If a number is divisible by 8, it must be divisible by 4.
  • True
  • False
Which of the following number is composite?
  • $$1$$
  • $$4$$
  • $$2$$
  • $$3$$
How many numbers from 1 to 100 are there each of which is not only exactly divisible by 4 but also has 4 as a digit ? 
  • 7
  • 10
  • 20
  • 12
A number is divisible by 8 if the number formed by units, tens and hundreds places is divisible by 8
  • True
  • False
Among the following numbers, how many numbers are divisible by $$4$$?
$$124, 118, 280, 314, 512$$
  • $$4$$
  • $$3$$
  • $$2$$
  • $$1$$
Number which is divisible by 5 is
  • $$75,620$$
  • $$8,319$$
  • $$724$$
  • $$89,652$$
The number of composite number between $$101$$ and $$120$$ are 
  • $$11$$
  • $$12$$
  • $$13$$
  • $$None$$
Fill in the blanks.
Every composite number can be expressed as a product of ____, and this factorization is unique except for the order in which the prime factors occur.
  • Co-primes
  • Twin primes
  • Primes
  • All of these
A number is divisible by 4 if the number formed by the digits in ............. places is divisible by 4
  • units and tens
  • tens and hundreds
  • units
  • units, tens and hundreds
Number which is divisible by 2 is
  • $$7,907$$
  • $$63,195$$
  • $$72,028$$
  • $$3,451$$
A number is divisible by 2 if it has 0 or 2 or 4 or 6 or 8 in its units place
  • True
  • False
A number is divisible by 4 if the number formed by units and tens places is divisible by 4
  • True
  • False
A number is divisible by 3 if the sum of the digits in the number are divisible by 3
  • True
  • False
7248 is divisible by __________.
  • $$2$$
  • $$4$$
  • Both $$(A)$$ and $$(B)$$
  • None of these
The numbers which are not multiples of 2 are called
  • even
  • odd
  • prime
  • composite
A number is divisible by 5 if it has 0 or 5 in its units place
  • True
  • False
Some factor is missing in the factor tree. Fill it up.
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  • $$4$$
  • $$6$$
  • $$3$$
  • $$2$$
A number is divisible by 8 if the number formed by the digit in ............. place is divisible by 8.
  • units and tens
  • tens and hundreds
  • units
  • none of these
A number is divisible by 9 if the sum of the digits of the number is divisible by ............
  • $$3$$
  • $$4$$
  • $$6$$
  • $$9$$
HCF of $$36$$ and $$144$$ is ______.
  • $$36$$
  • $$144$$
  • $$4$$
  • $$2$$
HCF of $$120, 144$$ and $$216$$ is:
  • $$38$$
  • $$24$$
  • $$120$$
  • $$144$$
The two numbers which have only 1 as their common factor are called ...........
  • Co-primes
  • Twin primes
  • Composite
  • Even numbers
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