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Let the total work be '60x' units. So, efficiency of 'A' = 60x ÷ 12 = '5x' units/day efficiency of 'B' = 60x ÷ 15 = '4x' units/day efficiency of 'C' = 60x ÷ 20 = '3x' units/day Work done by 'A', 'B' and 'C' together in 4 days = Work done by 'A' alone in 3 days + Work done by 'A', 'B' and 'C' together on 4th day Work done by 'A', 'B' and 'C' together in 4 days = 5x X 3 + (5x + 4x + 3x) X 1 = 15x + 12x = '27x' units So, Work done by 'A', 'B' and 'C' together in next 4 days = '27x' units Amount of work done in first 8 days = 27x X 2 = '54x' units Remaining work = 60x - 54x = '6x' units So, time taken by 'A' to complete the remaining work = 6x ÷ 5x = 1(1/5) days So, total time taken = 8 + 1(1/5) = 9(1/5) days
If digits of each number are added and sum is multiplied by 4, and the resultants are arranged in descending order, which number will be at last position?
Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.
If 2 is subtracted from the second digits of each of the numbers, how many numbers thus formed will be divisible by three?
Find the number which does NOT belong to the group : 101, 242, 363, 484
Select the option in which the numbers are related in the same way as are the numbers of the following set.
(15, 315, 7)
Select the letter from among the given options that can replace the question mark (?) in the following series.
P, N, J, H, ?
Three of the following four numbers are alike in a certain way and one is different. Pick the number that is different from the rest .
How many numbers are there between 99 and 1000 such that the digit 8 occupies the units place?
Select the number-pair that is different from the other three.
