Class 10 Math Real Numbers Objective Questions

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1. Q1. The HCF of 12 and 18 is

   (A)2(B)3(C)6(D)36

2. Q2. The LCM of 4 and 6 is

   (A)24(B)12(C)2(D)10

3. Q3. Which of the following is an irrational number?

   (A)√9(B)0.25(C)√2(D)3/7

4. Q4. If HCF(a, b) = 4 and a × b = 96, then LCM(a, b) is

   (A)24(B)48(C)384(D)12

5. Q5. The prime factorisation of 60 is

   (A)2 × 3 × 10(B)2² × 3 × 5(C)2 × 3² × 5(D)4 × 15