Question 64

If a 10-digit number 1220x558y2 is divisible by 88, then the value of(x + y) is:

Solution

It means the whole number 1220x558y2 must be divided by all the multiples of 88 which are 2, 4, 8 and 11.

Check the possible values so that the whole number must be divisible by 11

2+8+5+0+2 = 1+2+x+5+y

Therefore x + y = 9

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