
Ques:- Gold is 19 times as heavy as water and copper is 9 times. In what ratio should these metals be mixed so that the mixture may be 15 times as heavy as water?
A. 2 : 1
B. 3 : 2
C. 4 : 3
D. 5 : 4
Ques:- Which of the following is always odd?
A. Sum of two odd numbers
B. Product of two odd numbers
C. Difference of two odd numbers
D. None of these
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