Arihant Expert Team Solutions for Exercise 9: Quantitative Aptitude

What will come in the place of question mark for the following number series:

$21, 37, 40.2, 88.2, 94.6, ?$.

The sum of four consecutive even numbers is $107$ more than the sum of three consecutive odd numbers. If the sum of the smallest odd number and the smallest even number is $55$, then what is the smallest even number?

A, B, C each working alone, can finish a piece of work in $27,33,45$ days respectively. A starts the work by working alone for $12$ days, then B takes over from A and works for $11$ days. At this stage C takes works from B and completes the remaining work. In how many days was the whole work completed?

Train A, travelling at $\mathrm{S} \mathrm{m}/\mathrm{s}$, can cross a platform double its length in $21$ seconds. The same train, travelling at $\mathrm{S}+5 \mathrm{m}/\mathrm{s}$, can cross the same platform in $18$ seconds. What is the value of $\mathrm{S}$?

A man can row $24 km$ in upstream and $54 km$ in downstream in $6$ hours. He can also row $36 km$ in upstream and $48 km$ in downstream in $8$ hours. What is the speed of the man in still water?

What would be the area of a rectangle whose area is equal to the area of circle of radius $7 cm$?

In a village, three people contested for the post of village pradhan. Due to their own interest, all the voters voted and no one vote was invalid. The losing candidate got $30\%$ votes. What could be the minimum absolute margin of votes by which the winning candidate led by the nearest rival, if each candidate got an integral percent of votes?

The price of an article is first increased by $20\%$ and later on the price were decreased by $25\%$ due to reduction in sales. Find the net percentage change in final price of that article?