The number 7490 xy is divisible by 90 find out x + y
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Answer:
X = 7 and Y = 0.
X + Y = 7 + 0 = 7
Step-by-step explanation:
Hey Mate,
The divisibility rule of 90 : If the number divided by 9 and 10 then its also divide by 90.
The divisibility rule of 9 : If the sum of all number is divided by 9 then the whole number is divided by 9.
The divisibility rule of 10 : If any number end with "0" or unit digit of any number is "0" then the whole number is divided by 10.
The Number is 7490XY.
Y is definitely 0 then its divide by 10
Now we have to find the X.
7 + 4 + 9 + 0 + X + 0 = 20 + X.
So the nearest number which divide by 9 is 27 .
So X = 7,
20 + 7 = 27 and its divide by 9.
So, 749070 is a number which completely divide by 90.
When X = 7 and Y = 0.
So, X + Y = 7 + 0 = 7
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