Question
John does ½ piece of work in 3 hours, Joe does
¼ of the remaining work in 1 hour and George finishes remaining work in 5 hours. How long would it have taken the three working together to do the work?Solution
John can do 1/2 work in 3 hours, So he can complete entire work in 6 hours. Remaining work = 1- 1/2 = ½ Joe does 1/4 of the remaining work i.e 1/8 work in 1 hour, So he can complete entire work in 8 hours. Now remaining work = 3/8 George finishes remaining work in 5 hour. George do 3/8 work in 5 hours, So he can complete entire work in 40/3 hours. If all three work together, then, 1/6 + 1/8 + 3/40 = 30/11 So, the answer would be option d) 2(8/11) hours
Find the wrong number in the given number series.
16, 24, 36, 54, 81, 120.5
2Â Â Â Â Â 27Â Â Â Â Â Â 43Â Â Â Â Â 50 Â Â Â Â Â Â 56 Â Â Â Â Â Â Â 57
...6Â Â Â 9Â Â Â 14Â Â Â Â 22Â Â Â Â 30Â Â Â Â Â 41Â Â Â Â Â
...259, 372, 495, 618, 741, 864
Find the wrong number in the given number series.
10, 17, 26, 39, 59, 85
- Find the wrong number in the given number series.
60, 75, 101, 150, 210, 285 171, 86, 87, 132, 266, 668
- In the given number series, find the wrong number.
120, 60, 30, 15, 7.5, 3.25, 1.875 164, 160, 172, 136, 188, 128
42, 61, 78, 93, 102, 109
