Question
245 ml of mixture contains milk and water in the ratio
of 10:x respectively. If 45 ml of water and 55 ml of milk is added into it then ratio of milk to water in the resulting mixture will be 2:1. Find the value of lsquo;xrsquo;. STSolution
Quantity of milk in 245 ml of mixture = 245 times; 10/(10 + x) Quantity of water in 245 ml of mixture = 245 times; x/(x + 10) According to question; {2450/(10 + x) + 55}/{245x/(x + 10) + 45} = 2/1 Or, 2450/(10 + x) + 55 = 490x/(x + 10) + 90 Or, (2450 ndash; 490x)/(x + 10) = 35 Or, 2450 ndash; 490x = 35x + 350 Or, 525x = 2100 Or, x = 4
50 62 ? 96 126 138
...89Â Â Â Â Â 78Â Â Â Â Â 74Â Â Â Â Â 67Â Â Â Â Â 63Â Â Â Â ?
4 6 ? 31 119 601
...Find the maximum number of trees which can be planted, 25 meters apart, on the two sides of a straight road 2125 meters long
55 46 60 41 65 36 ?
8 6 2 ? -1 9.5
...9999 6666 ? 2962.66 1975.11 1316. 74
...2, 17, 147, 1167, 8157, 48957
3,   2,   3,  8,  31,  ?
Study the given pattern carefully and select the number that can replace the question mark (?) in it.
4 7 6
15 ? 21
44 68 60
