Question
Aman and Bhuvan can complete a work in 21 days together,
while Bhuvan alone can do it in 35 days. If the ratio of efficiencies of Aman and Chintu is 2:3, find the ratio of efficiencies of Bhuvan and Chintu.Solution
ATQ,
Let total work = 105 units {LCM of 21 and 35}
Efficiency of (Aman + Bhuvan) = 105/21 = 5 units/day
Efficiency of Bhuvan = 105/35 = 3 units/day
Therefore, efficiency of Aman = 5 – 3 = 2 units/day
Efficiency of Chintu = 2 × (3/2) = 3 units/day
Required ratio = 3 : 3 = 1 : 1
What will come in place of the question mark (?) in the following series?
21, 36, 66, 126, ?, 486
10,14,26,42,70,?
81, 41, 42, 64.5, ?, 330
What will come in place of the question mark (?) in the following series?
5, 14, 41, 122, 365, 1094, ?
1500 Â Â Â 150Â Â Â 30Â Â Â ? Â Â Â Â 3.6Â Â Â Â 1.8
Find the missing number in the series:
7, 21, 19, 57, 55, ?
71, 79, 88, 152, ?, 393
1     1      4       ?      280       3640
...3, 10, 29, 66, ?
Find the missing number in the given number series.
 1165, ?, 1040, 985, 935, 890Â
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