Certain money becomes double in 4 years according to simple interest. In how many years, will it becomes 3 times?
8 years
10 years
12 years
2 years
Certain money doubles itself according to compound interest in 3 years. How much time it takes to become 4 times?
6 years
If x and y are the two digits f the number 653xy such that this number is divisible by 80, then x+y is equal to:
2
3
4
6
The smallest number which when diminished by 3 is divisible by 21,28,36 and 45 is...
869
859
1263
427
If 1.5x=0.04y then the value of (y-x)/(y+x) is
730/77
73/77
7.3/77
None
The average age of a class is 15.8 years. The average age of boys in the class is 16.4 years while that of girls is 15.4 years. What is the ratio of boys to girls in the class?
1:3
3:4
3:5
None Of These
If one-seventh of a number exceeds its eleventh part by 100 then the number is…
770
1100
1825
1925
The ratio of Rita's age to her mother's age is 3:8. The difference of their ages is 35 years. The ratio of their ages after 4 years will be:
7:12
5:12
38:43
42:47
Gold is 19 times as heavy as water and copper is 9 times as heavy as water. In what ratio should these be mixed to get an alloy 15 times as heavy as water?
1:1
2:3
1:2
3:2
A tap can fill the tank in 16 minutes and another can empty it in 8 minutes. If the tank is already half full and both the taps are opened together, the tank will be:
filled in 12 min
emptied in 12 min
filled in 8 min
emptied in 8 min