Question
βPβ and βQβ can complete a task together in 30
days. If βPβ is 60% more efficient than βQβ, how many days will βQβ take to finish the work alone?Solution
Let the efficiency of βQβ be 10x units. Efficiency of βPβ = 10x Γ 1.6 = 16x units Total work = 30 Γ (10x + 16x) = 780x units Time taken by βQβ alone = 780x Γ· 10x = 78 days
Find the wrong number in the given number series,
125, 150, 250, 475, 875, 1500
191 341 221 331 251 281
131, 132, 140, 166, 231, 356Β
- Find the wrong number in the series.
2, 3, 7, 15, 31, 63, 127 - In the given number series, find the wrong number.
120, 60, 30, 15, 7.5, 3.25, 1.875 16, 16, 32, 128, 1024, 16384Β
2, 9, 32, 87, 198, 387
Find the wrong number in the given number series.
12, 24, 72, 216, 1440, 8640
4, 11, 36, 164, 986, 7204
Find the wrong number in the given number series.
Β 289, 274, 260, 247, 235, 225