Question

A.) Find the LCM of the given set of
numbers and state their common
property.
(i) 9 and 4 (ii) 12 and 5

B.) Find the least number which leaves a
remainder 13 when divided by each of
15, 18 and 25.

C.) Determine the greatest 3-digit number exactly divisible by 8, 10 and 12

D.) Three students start jogging together
on a circular track. If they respectively
take 6 minutes, 8 minutes and
12 minutes to complete one round,
when will they meet again?

E.) Three neon signs are turned on at the
same time. The first one blinks 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 blinked last
at 9 p.m.?​

Answer 1

Answer:

A.)

(i). 2×2×3×3

(ii)2×2×3×5=60

Answer 2

Answer:

A.) Find the LCM of the given set of

numbers and state their common

property.

(i) 9 and 4 (ii) 12 and 5

B.) Find the least number which leaves a

remainder 13 when divided by each of

15, 18 and 25.

C.) Determine the greatest 3-digit number exactly divisible by 8, 10 and 12

D.) Three students start jogging together

on a circular track. If they respectively

take 6 minutes, 8 minutes and

12 minutes to complete one round,

when will they meet again?

E.) Three neon signs are turned on at the

same time. The first one blinks 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 blinked last

at 9 p.m.?