Q57. Difference in the place values of 3 used at two places in the number 934530 is:

Q40. Find the area of four walls of a room having length 12.5 m, breadth 9 m and height 7 m

Q10. If 3 men or 9 boys can finish a work in 21 days, then in how many days can 5 men and 6 boys finish the same work?

Q13. If A: B=2/3:5/8, B: C=1/3:5/9 and C:D = 5/6:3/4 then the ratio A: B: C: D is: