**kpit cummins Aptitude Interview Logic Question - 22 March**

Product of three consecutive numbers are 7980.

Then the sum of these consecutive numbers would be ?

**For Solution :**Click Here

This Blog is a collection of brain teasers, puzzles (maths,fun,brain etc), riddles,Questions, Quiz.

Product of three consecutive numbers are 7980.

Then the sum of these consecutive numbers would be ?

Subscribe to:
Post Comments (Atom)

Difficulty Level 3/5
(726)
Logic Puzzles
(483)
Difficulty Level 4/5
(456)
Riddles
(364)
Difficulty Level 2/5
(358)
Maths Puzzles
(344)
Picture Puzzles
(329)
Trick Teasers
(282)
Popular Puzzles
(212)
Rebus Puzzles
(155)
Humor Puzzles
(151)
Interview Puzzle
(124)
Series Puzzles
(124)
What Word Am I
(99)
Difficulty Level 1/5
(90)
Trivia
(76)
Mystery Puzzles
(73)
Equation Puzzles
(72)
Difficulty level 5/5
(53)
Murder Mystery Puzzles
(43)
Square Count
(40)
Probability Puzzles
(39)
Who Am I
(39)
IAS-EXAMS
(34)
Cipher Puzzles
(32)
Algebra
(31)
Science Puzzles
(30)
Situation Puzzles
(28)
Puzzles of Age
(21)
Read Between Lines Puzzles
(18)
Google Interview Puzzle
(17)
MatchSticks-Riddles
(15)
Microsoft Interview Puzzles
(15)
statement
(15)
Time Distance Problem
(14)
Odd One Out
(13)
Relationship Puzzles
(11)
Cards
(10)
Story Puzzles
(10)
Paradox Puzzles
(9)
Classic
(6)
Directional Puzzles
(6)
Best Of 2011
(5)
clever
(5)
Brain-Twister
(4)
Mind Games
(4)
Analytical
(3)
What Does This Text Mean
(3)
CHALLENGING
(2)
Double Meaning
(2)
Acronym
(1)
Measure
(1)
Suduko
(1)
Video Riddle
(1)
chess
(1)
coin-Puzzles
(1)
m
(1)
pop
(1)
triv
(1)

89.33?

ReplyDelete60.....

ReplyDeleteno. are 19 20 21

60

ReplyDelete60- 19*20*21

ReplyDeleteLogic:

ReplyDelete19, 20, 21

Let's represent the 7980 as a product of prime numbers:

7980 = 19*7*3*2*2*5, as 19 is a largest prime number here, and closest number of 19 which ends with 0 or 5 is 20 => required numbers are 19, 20, 21

60

ReplyDelete60

ReplyDelete60

ReplyDelete60

ReplyDelete19*20*21=7980

ReplyDelete19+20+21=60

x(x+1)(x+2)=7980

ReplyDelete=>x3+3x2+2x-7980=0

=>(x-19)(x2+22x+420)=0

x cant -ve so x=19 other no is 20 &21

sum=19+20+21=60

Probably you are the only one who did this algebra :-D

DeleteThnxx !!

60 ; 19,20,21

ReplyDelete60 19*20*21

ReplyDeletesum: 60; 19*20*21

ReplyDelete60

ReplyDeleteNos are - 19 20 and 21

Is there any shortcut method to solve this?

take numbers as x-1, x and x+1, product is x^3-x. nearest cube to 7980 is 8000 which is 20^3 and 7980=8000-20. sum is 3x = 60

ReplyDelete