CBSE Class 10-Mathematics: Chapter – 1 Real Numbers Part 2 (For CBSE, ICSE, IAS, NET, NRA 2022)
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Question 7:
For what least value of a natural number, is divisible by ?
(a) 0
(b) -1
(c) 1
(d) No value of ‘n’ is possible
Answer:
(c) 1
Question 8:
The sum of a rational and an irrational number is
(a) Rational
(b) Irrational
(c) Both (a) & (c)
(d) Either (a) or (b)
Answer:
(b) Irrational
Question 9:
HCF of two numbers is 113, their LCM is 56952. If one number is 904, then other number is:
(a) 7719
(b) 7119
(c) 7791
(d) 7911
Answer:
(b) 7119
Question 10:
A lemma is an axiom used for proving
(a) Other statement
(b) No statement
(c) Contradictory statement
(d) None of these
Answer:
(a) Other statement
Question 11:
If HCF of two numbers is 1, the two numbers are called relatively ________ or ________.
(a) Prime, co-prime
(b) Composite, prime
(c) Both (a) and (b)
(d) None of these
Answer:
(a) Prime, co-prime
Question 12:
is
(a) A terminating decimal number
(b) A rational number
(c) An irrational number
(d) Both (a) and (b)
Answer:
(b) a rational number
Question 13:
2.13113111311113 … is
(a) A rational number
(b) A non-terminating decimal number
(c) An irrational number
(d) Both (a) & (c)
Answer:
(c) An irrational number
Question 14:
The smallest composite number is:
(a) 1
(b) 2
(c) 3
(d) 4
Answer:
(c) 3