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

Let a, b and c be three numbers such that a : b : c = 1 : 2 : 3. Also, the sum of the three numbers is 66. Then, the value of (a + b)(a + c) will be

1452
1815
1089
432
None of these

Reveal answer Fill a bubble to check yourself

Multiple choice

The sum of 2 numbers is 9 and the sum of their squares is 53. The equation formed will be

x²+ 9x - 14 = 0
x²+ 9x + 14 = 0
x²- 9x - 14 = 0
x²- 9x + 14 = 0
None of these

Reveal answer Fill a bubble to check yourself

Multiple choice

The sum of all numbers from 1 to 50 is

1775
1275
1375
1456

Reveal answer Fill a bubble to check yourself

Multiple choice

A, B, C, D and E are five consecutive odd numbers. If the sum of C and E is 150, then what is the value of D?

73
77
75
69
None of these

Reveal answer Fill a bubble to check yourself

Multiple choice

Which of the following numbers have a sum 15?

7 5 3 1 8

7 and 8
7 and 5
5 and 1
5 and 3

Reveal answer Fill a bubble to check yourself

Multiple choice

Which of the following two numbers have a sum 19?

9 and 7
9 and 10
18 and 7
9 and 19

Reveal answer Fill a bubble to check yourself

Multiple choice

Which of the following two numbers have a sum 20?

15 3 2 19 61 5 6

3 and 19
5 and 15
61 and 2
3 and 6

Reveal answer Fill a bubble to check yourself

Multiple choice

Which of the following two numbers have a sum 9?

3 16 4 5 1

3 and 1
16 and 4
4 and 5
1 and 3

Reveal answer Fill a bubble to check yourself

Multiple choice

Which of the following two numbers have a sum 18?

9 4 1 12 16 8 2

9 and 8
4 and 12
16 and 2
8 and 4

Reveal answer Fill a bubble to check yourself

Multiple choice

Which of the following two numbers add up to a sum of 12?

9 4 7 11 2 3

9 and 3
4 and 7
11 and 2
None of these

Reveal answer Fill a bubble to check yourself

Multiple choice

The sum of the squares of three positive numbers is 138, while the sum of their products taken two at a time is 131. Their sum is

20
30
40
50
None of these

Reveal answer Fill a bubble to check yourself

Multiple choice

The sum of two numbers is 25 and their difference is 13. Find their product.

104
114
315
325
None of these

Reveal answer Fill a bubble to check yourself

Multiple choice

If the difference of squares of two consecutive even numbers is 84, then what is the sum of the numbers?

34
38
42
46
None of these

Reveal answer Fill a bubble to check yourself

Multiple choice

The product of two numbers is 9375 and the quotient, when the larger one is divided by the smaller, is 15. The sum of the numbers is

380
395
400
425
None of these

Reveal answer Fill a bubble to check yourself

Multiple choice

The product of two numbers is 120 and the sum of their squares is 289. The sum of the numbers is

20
23
169
170
None of these

Reveal answer Fill a bubble to check yourself

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