Math challenge , Day 1

Day -1

               

Good Luck

1. The respective ratio of radii of two right circular cylinders ( A& B) is 2:3. The respective ratio of their volume is 9:7. then what is the ratio of the height of the cylinders?
 9:7
 13:12
 7:8
81:28

2. 8 men can do a work in 20 days and 8 women can do the same work in 32 days. in how many days will 8 women and 5 men do the work, working together?
16
 18
 20
 25


3. one pipe is 3 times as fast as another Pipe, if working together they can fill a tank in 36 hours, the slower pipe alone will take how many hours to fill the tank?
 144 hours
70 hours
90 hours
 120 hours


4. the numbers are in the ratio 4:5:6 and their product is 7680. The largest number is 


 13
 28
24
30

5.  the difference of a number and its 3/5 is 40. what is the number?
100
061
160
150


6. 3+4+3/7+4/7=?

8
8/7
4
9

7. 8+6/5+12+7-1/5

 28
19
 13
 29

8. 600 g of sugar solution has 40% sugar in it. How much sugar should be added to make it 50% in the solution?
 120 g
16 g
12 g
 160 g

9. the average of first 20 even number is ?

21
20
22
23

10. 3  5  9  17  ?

35
33
78
1024

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