Question

Math hcf and lcm plz solve

Answer 1

8= 2×2×2
9= 3×3
12= 2×2×3
15= 3×5

LCM = 2×2×2×3×3×5
= 360
HCF = 2×3×5
=30
Hope it may help u...

Answer 2

The question demands the minimum time, so we have to find out LCM ( $<b>Least</b>$ Common Factor ).

Prime Factorisation –

8 = 2 × 2 × 2 = 2³

9 = 3 × 3 = 3²

12 = 2 × 2 × 3 = 2² × 3¹

15 = 3 × 5 = 3¹ × 5¹

In LCM, we have to take the maximum power of a particular number.

LCM = 2³ × 3² × 5¹ = 8 × 9 × 5 = 360 minutes

$<b><u>1 hour = 60 minutes</u></b>$

So, 360 minutes = 360 / 60 hours = 6 hours

Hence, they all will meet again at $<b>12 p.m.</b>$