What is the smallest number that should be added or subtracted from 482 to make the number divisible by 5?

Question 5 Exercise 3.3

Next

Answer:

SOLUTION:

we can find the missing number by firstly finding the sum of digits of the given numbers and then subtract it from those multiple of 3, which are greater than this sum to get the smallest and greatest digits.

i) 6+7+2+4=19

multiples of 3 greater than 19 are 21,22,27,30

therefore, 21-19=2, 24-19=5, 27-19=8, 30-19=11

smallest digit=2 greatest digit=8

ii) 4+7+6+5+2=24

24 is a multiple of 3 so smallest digit is 0 greater than 24 are 27,30,33,36

27-24=3, 30-24=6, 33-24=9 36-24=12

smallest digit=0 and greatest digit=9

Video transcript

"hello guys welcome to lido homework today we are doing question number five which is write the smallest digit and the greatest digit in the space of each of the following numbers so that the number formed is divisible by three okay so first of all what is the divisibility test of three let's see so the divisibility test of 3 is that the addition of all the digits of a given number should be divisible by 3. so this is very easy so in the first case it is dash 6 7 2 4. now when you add all the digits the number should be divisible by 3 right so let's see if 6 plus 7 is 13 13 plus 2 is 15 15 plus 4 is 19. now 19 is not divisible by 3 but what is the nearest number to 19 which is divisible by 3 it is 21 and 19 plus what is 21 19 plus 2 is 21 so our answer to the first one is 21. did you get how to do it okay so for a the answer is 21 let's go see the second one the second one is 4 7 6 dash and then two four plus seven is eleven eleven plus six is seventeen seventeen plus five is twenty two twenty two plus two is twenty four now as you know 24 is directly divisible by three so even if you put zero over here the addition of all these numbers is going to remain as 24 therefore we can put 0 over here so the answer for the first one is 2 and the answer to the second one is 0. if you yet have any doubts please let me know in the comments below so that i can help you out also please like the video and subscribe the channel thank you so much guys"

Was This helpful?