Question

11) Find the greatest 3-digit number which is exactly divisible by 4,8, and 12.
12) Three students starts jogging together on a circular track. If they respectively
take 6 minutes, 8minutes and 12 minutes to complete one round, when will
they meet again?
13) The traffic light different road crossing change after every 48 seconds, 72
seconds and 108 seconds respectively .If they change simultaneously at 7 a.m
, at what time will they change simultaneously again?
14) Three neon signs are turned on at the same time, the first one blink after
every 10 seconds, the second one after every 20 seconds and the third one
after every 25 seconds ,When will they blink together again if they linked last
at 9.pm
15) If the LCM of two numbers is 32 and their product is 128,determine their
HCF
16) The HCF and the LCM of two numbers are 15 and450 respectively .If one
number is 75, what is the other?

Answer 1

Answer:

12.when each of them will complete 24 minutes of their jogging

Answer 2

Answer:

ans of 11)960

12) 12 minutes

13)7am 7 minutes and 12 seconds

14)10:40pm

15)4

16)90