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Solution


Q.

Assertion (A): If LCM(p, q) = 30 and HCF(p, q) = 5, then p × q = 150.
Reason (R): LCM of (a, b) × HCF of (a, b) = a × b.
1 Both A and R are true, and R is the correct explanation of A  
2 Both A and R are true, but R is not the correct explanation of A.
 
3 A is true, but R is false.
 
4 A is false, but R is true  

Ans.

(1)

We know that LCM(p, q) × HCF(p, q) = p × q.
⇒ 30 × 5 = p × q ⇒ 150 = p × q.