Mathematics · Quantitative Aptitude

Number Sums and Series

287 Questions

Number sums and series questions test the ability to find patterns and calculate the sum of number sequences. These problems are a staple in the quantitative aptitude sections of various competitive exams. Practice this collection to improve speed and accuracy in solving arithmetic and geometric series problems.

Sum of consecutive integersGeometric series sumsRatio and proportion sumsOdd and even number propertiesRoman numeral calculations

Number Sums and Series Questions

Multiple choice technology

A fast way to add up this column of numbers is to click in the cell below the numbers and then:

  1. Click Subtotals on the Data menu.

  2. View the sum in the formula bar.

  3. Click the AutoSum button Button image on the Standard toolbar, then press ENTER.

  4. Noneofthese
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The fastest method is clicking AutoSum (which automatically selects the column above) and pressing ENTER to confirm. Subtotals creates groupings, the formula bar only shows the cell content, and manual typing is slower than AutoSum.

Multiple choice

Find the sum of 112 and 616 rounded to the nearest ten.

  1. 730

  2. 720

  3. 710

  4. 740
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In number 112, digit at tens place is 1 and decider is 2, which is less than 5. Thus, 112 rounded off to the nearest tens is 110. In number 616, digit at tens place is 1 and decider is 6, which is greater than 5. Thus, 616 rounded off to the nearest ten is 620. Sum of both the numbers = 110 + 620 = 730