Check the divisibility of the following numbers by IOR 40 2. 6164 4325.9213, 294EXERCISE 1.21. P2135 is a multiple of9, where y is a digit, what is the value of y?2. 13125 is a multiple of 9, where z is a digit, what is the value of ?You will find that there are two answers for the last problem. Why is this so?3. 124x is a multiple of 3, where x is a digit, what is the value of x?(Since 24x is a multiple of 3, its sum of digits 6+x is a multiple of 3, so 6+ x is oneof these numbers: 0,3,6,9,12,15,18,... But since x is a digit, it can only be that6+x=6 or 9 or 12 or 15. Therefore,x=0 or 3 or 6 or 9. Thus, x can have any offour different values.)4. 3125 is a multiple of 3, where is a digit, what might be the values of z?WHAT HAVE WE DISCUSSED?n be written in

Check the divisibility of the following numbers by IOR 40 2. 6164 43

1.	Check the divisibility of the following numbers by IOR 40 2. 6164 4325.9213, 294EXERCISE 1.21. P2135 is a multiple of9, where y is a digit, what is the value of y?2. 13125 is a multiple of 9, where z is a digit, what is the value of ?You will find that there are two answers for the last problem. Why is this so?3. 124x is a multiple of 3, where x is a digit, what is the value of x?(Since 24x is a multiple of 3, its sum of digits 6+x is a multiple of 3, so 6+ x is oneof these numbers: 0,3,6,9,12,15,18,... But since x is a digit, it can only be that6+x=6 or 9 or 12 or 15. Therefore,x=0 or 3 or 6 or 9. Thus, x can have any offour different values.)4. 3125 is a multiple of 3, where is a digit, what might be the values of z?WHAT HAVE WE DISCUSSED?n be written in
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