Wipro Company Numerical Ability Time and Work

A is twice as efficient as B and, B is four times as efficient as C. A, B and C take'turns constructing a wall starting with A on day 1 followed by B then C and so on. If C alone can construct the wall in 120 days, what percentage of the wall is constructed by A?

a. 45
b. 52.5
c. 60
d. 62.5

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Wipro Other Question
A person buys some apples and mangoes from the market at a rate such that a mango is two times costlier than an apple and he sells them such that a mango is thrice the price of an apple. By selling the apple at twice its cost price, he makes the total of 150% profit. Find the proportion of mangoes to the apples.

a. 3 : 5
b. 3 : 4
c. 1 : 2
d. Indeterminate The units digit of a 3-digit number is square of the hundred's digit. Which of the following can be the difference between the number and the number formed by reversing the order of the digits?

a. 200
b. 198
c. 196
d. 194