Determine the smallest positive number y such that 10500y is divisible by 11

since 11 does not divide 10500,

10500*11 = ______ is the smallest multiple of 10500 that is divisible by 11

unless you meant the six-digit number whose last digit is y.
In that case, since 105000 = 9545*11 + 5, we need to add6, giving us 105006

To determine the smallest positive number y such that 10500y is divisible by 11, we need to find the smallest value of y that makes the value of 10500y divisible by 11.

To do this, we will divide 10500 by 11 and see if the remainder is zero.

10500 ÷ 11 = 954 with a remainder of 6

Since the remainder is not zero, we need to increment y until we get a remainder of zero.

So, let's increment y by 1 and try again:

10500 × 2 = 21000

21000 ÷ 11 = 1909 with a remainder of 1

Still not zero, so let's increment y again:

10500 × 3 = 31500

31500 ÷ 11 = 2863 with a remainder of 7

Again, not zero. Let's increment y further:

10500 × 4 = 42000

42000 ÷ 11 = 3818 with a remainder of 2

Not there yet. Let's try again:

10500 × 5 = 52500

52500 ÷ 11 = 4772 with a remainder of 8

Still not zero. Let's increment y again:

10500 × 6 = 63000

63000 ÷ 11 = 5727 with a remainder of 3

Once again, not zero. Let's keep going:

10500 × 7 = 73500

73500 ÷ 11 = 6681 with a remainder of 9

No luck yet. Let's keep incrementing:

10500 × 8 = 84000

84000 ÷ 11 = 7636 with a remainder of 4

Still not zero. Let's try again:

10500 × 9 = 94500

94500 ÷ 11 = 8590 with a remainder of 0

Finally, we have found the smallest positive number y such that 10500y is divisible by 11.

Therefore, the answer is y = 9.