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There were 9 cards numbered 1 to 9. Four people A, B, C and D each collected two of them.
A said : “ The sum of my numbers is 6. ”
B said : “ The difference between my numbers is 5. ”
C said : “ The product of my numbers is 18. ”
D said : “ One of my numbers is twice the other. ”
What is the number on the remaining card ?

 Jun 2, 2020
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A =5 + 1 =6

B =7 -2 = 5

C =6 x 3 =18

D =4 and 8

So, the remaining card is 9

 Jun 2, 2020

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