Question
P, Q & R can finish a work in 10 days, 15 days, and 20
days, respectively, working alone. P and Q work on the first day, P and R work on the second day, P and Q work on the third day, and so on till the work is completed. In how many days the work will be completed?Solution
Then ATQ- First day - P + Q =6+4 =10unit second day-P + R=6+3 =9unit third day P+Q=6+4=10unit total work of three days =10+9+10 =29unit so 58units completed of total work = 3×2 =6days remaining work =60-58 =2 unit so, the remaining work will be completed by P+R = 2/9days Total days = 6+2/9 =56/9days
In each of the following series, one term is missing. Find the missing term.
1, 2, 6, 21, 88, ?
2Â Â Â Â Â 3Â Â Â Â Â Â 5 Â Â Â Â Â Â 9Â Â Â Â Â Â ? Â Â Â Â Â Â 33
...96 48 24 ? 6 3
...8, 9, 125, ?, 1331, 169Â
53 × 38 + 32 × âˆ›54872 = ?
150 Â Â Â 15Â Â Â 3Â Â Â ? Â Â Â Â 0.36Â Â Â Â 0.18
What should come in place of (?) question mark in the following number series.
256, 128, 64, 32, 16, ?
23, 27, 39, 59, ?, 123
80, 120, 30, 45, 9, 13.5, ?
24, 42, 60, ?, 96, 114
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