Ques:- Which one of the following numbers is divisible by 3?
A. 2345678
B. 2876423
C. 4006020
D. 9566003
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