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Number Series

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Friday, March 28, 2025

Select the related numbers from the given alternative. 80:730::?: 344

March 28, 2025 |

Logical Reasoning, Number Series, RRB NTPC Exam 27 Jan 2021, Solved

Select the related numbers from the given alternative. 80:730::?: 344

A45

B49

C50

D48

Akhilesh Mar 31 '25 at 21:57

correct answer is: option b (49)
Explanation: The relationship between the numbers in the given pair is as follows: The second number is derived from the cube of a number close to the square root of the first number. Specifically, $80 \approx 9^2$ and $730 \approx 9^3 + 1$ . Applying the same logic to find the missing number: $344 \approx 7^3 + 1$ , so the related number should be close to $7^2 = 49$ .

Option a: 45 doesn't fit the pattern of being the square root of a number that can then be cubed and have 1 added to it to result 344.

Option b: 49 fits the pattern. $7^2 = 49$ and $7^3 + 1 = 344$

Option c: 50 doesn't follow the relationship established in the first pair.

Option d: 48 doesn't follow the relationship established in the first pair.

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Friday, January 3, 2020

Find the fourth number which is proportional to 8, 18, 24

January 03, 2020 |

General Aptitude, KPTCL Assistant Exam (Mescom) SLOT1 2017, Number Series, Solved

Find the fourth number which is proportional to 8, 18, 24.

A28

B72

C48

D54

prakash Oct 19 '2017 at 14:17

Answer is : 54

Explanation:

8 :18 = 24 :x

$\frac{8}{18} = \frac{24}{x}$

$x = \frac{24 \times 18}{8}$

$x = 54$

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Monday, December 23, 2019

A number divided by 68 gives the quotient 269 and remainder zero. If the same number is divided by 67, the remainder is

December 23, 2019 |

General Aptitude, Number Series, RRB ASSISTANT LOCO PILOT (Allahabad) 2010, Solved

A number divided by 68 gives the quotient 269 and remainder zero. If the same number is divided by 67, the remainder is

A0

B1

C2

D3

rajenda Dec 23 '2019 at 16:27

Correct answer is:1

Explanation:

According to question

$\Large \frac{269 \times 68}{67}\Rightarrow \frac{269}{67} \times \frac{68}{67}$

Remainder = 1×1=1

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Saturday, December 14, 2019

In each of the following questions, a number series is given with one term missing. Choose the correct alternative that will continue the same pattern and fill in the blank spaces.3, 9, 27, 81, (.…)

December 14, 2019 |

Logical Reasoning, Number Series, RRB GG Exam (Bhopal) 2009, Solved

In each of the following questions, a number series is given with one term missing. Choose the correct alternative that will continue the same pattern and fill in the blank spaces.
3, 9, 27, 81, (.…)

A324

B243

C210

D162

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Find out the wrong term.57. 196, 169, 144, 121, 80

December 14, 2019 |

Logical Reasoning, Number Series, RRB GG Exam (Bhopal) 2009, Solved

Find out the wrong term. 57. 196, 169, 144, 121, 80

A80

B169

C121

D196

rohan Jan 11 '2020 at 13:49

Correct answer is: 80

Explanation:

The sequence is $(14)^2, (13)^2, (12)^2, (11)^2, (10)^2.$
So, 80 is wrong and must be replaced by $(10)^2$ i.e. 100.

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