Question
A work can be completed by ‘A’ and ‘B’, alone in
18 days and 12 days, respectively. Find the number of days taken by ‘C’ to complete the same work alone if ‘A’, ‘B’ and ‘C’ together can complete the whole work in 4 days.Solution
Let total work = 36 units (LCM of 18 and 12) Efficiency of ‘A’ = (36/18) = 2 units/day Efficiency of ‘B’ = (36/12) = 3 units/day Combined efficiency of ‘A’, ‘B’ and ‘C’ = (36/4) = 9 units/day Efficiency of ‘C’ = 9 – (2 + 3) = 4 units/day Required time taken = (36/4) = 9 days
A+B means A is father of B.
A-B means A is brother of B.
A*B means A is the mother of B.
A&B means A is sister of B.
Which o...
Among five friends, Rohan is shorter than Sushila and taller than Hardik. Niza is taller than Harry but shorter than Hardik. Sushila is shorter than Roh...
Statement:
A. Some elephants are whales.
B. Some fish are giraffe.
C. All giraffes are lions.
Conclusion:
(I) Som...
The probability a red marble selected at a random from a Jar containing p red, q blue and "r” green marbles is
Answer the question given below on the basis of the given number and symbol series.
(left) 3 @ 2 $ $ # % 4 ^ * 6 @ 0 6 * % 2 £ 2 & 2 5 % 2 3 (...
If A means '×', B means '÷', C means '–' and D means '+', then find the value of the following.
5 D 16 A 5 B 8 C 8
649, 457, 189, 228, 497
What will be the product of the third digit of the second smallest number from the left and the first digit of the seco...
How many people are only lawyers?
Study the given pattern carefully and select the number that can replace the question mark (?) in it from the given alternatives.
If Z = 52 and ACT = 48, then BAT will be equal to
