Question

Exercise 6.7
1. Find the LCM of 20, 24 and 30.
2. What number should be subtracted from 65 to make it divisible by 6, 12 and is
Find the number that should be subtracted from 423 to make it a multiple of n
and 15.
Three traffic signals glow at intervals of 5, 10 and 15 minutes. If these signals
together at a certain time, when will they glow together again?
5. Church bells in 3 churches ring at intervals of 10, 12 and 15 minutes. If they
together at 8:30 a.m., when will they ring together again?
4.​

Answer 1

Answer:

1. The least common multiple 120 is a product of common & odd prime factors between the integers which is divisible by each one an integer of this same group.
2. Baki nhi pata...