Practicing Success
Three numbers are in the proportion of 3 : 8 : 15 and their LCM is 8280. What is their HCF? |
60 69 75 57 |
69 |
HCF = h ATQ N1 : N2 : N3 3 : 8 : 15 N1 ⇒ 3 × h = 31 × h ........ (i) N2 ⇒ 8 × h = 23 × h ........ (ii) N3 ⇒ 15 × h = 31 × 51 × h ...... (iii) LCM if (i), (ii), and (iii) is 23 × 31 × 51 × h = 23 × 31 × 51 × h = 8280 h = 69 |