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18. If the 4-digit number 2X Y7 is exactly divisible by 3, then what is the least value of (X + Y)? |
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Answer» 2XY7 is divisible by 3sum of digit should be multiple of three2+X+Y+7=9+X+Yif we add 3 to the 9 it will be multiple of 3.Therefore, x+Y = 3The least value of (X+Y) is 3. 2XY is divible by 3sum of digit should be multiple of three2+X+Y+7=9+X+YIf we add 3 to the 9 it will be multiple of 3There fore, X+Y=3The least value of (X+Y)is 3 3 is the correct answer of the given question is |
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