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Ques:- Find out the wrong number in the series:
7, 8, 18, 57, 228, 1165, 6996
7, 8, 18, 57, 228, 1165, 6996
A. 228
B. 57
C. 18
D. 8
Ques:- What smallest number should be subtracted from 6708 so that it may be divided by 9?
A. 1
B. 2
C. 3
D. 4
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