Latest Elitmus Aptitude Question SOLUTION: kunti had 4 sons. each sibling is either 1 year older or younger.she multiply their ages and write in a diary. all born on 1st april year different. ques was lyk dis.. multiplicati

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(#M40039356) ELITMUS Numerical Ability question asked on 7th sep Keep an EYE

kunti had 4 sons. each sibling is either 1 year older or younger.she multiply their ages and write in a diary. all born on 1st april year different. ques was lyk dis..
multiplication f agees will be..
option..
1. prime number +1.
2.a square number -1.
3. divisible by 10 always.
4.divisible by previous number.

Asked In Elitmus Rozzer (9 years ago)

Unsolved Read Solution (10)

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Read Solution (10) :

Rozzer  (9 years ago)

@swati. 119 is not a prime number...answer will be square number -1.
consider..
1*2*3*4=24....=25-1
2*3*4*5=120...=121-1
3*4*5*6=360..=361-1
4*5*6*7=840...=841-1
5*6*7*8=1680..=1681-1
6*7*8*9=3024..=3025-1

Is this solution Helpfull? Yes (47) | No   

sreekanth  (9 years ago)

first take 1 2 3 4
product=24
option1--> 23+1 satisfies
option2--> 5^2-1 satisfies
so take 2 3 4 5
product=120
0pt 1--> 119+1=120
but 119=17*7 so not a prime number
opt 2--> 11^2-1=121-1=120 satisfies.
so answer is option 2......(square of a number-1)

Is this solution Helpfull? Yes (10) | No   

Ravi Chauhan  (9 years ago)

take age as 1,2,3,4
1*2*3*4=24(prime number(23)+1 , sqr(5)-1) satisfies

now take 2,3,4,5
2*3*4*5=120(sqr(11)-1)

Hence answer is [a square number - 1]

Is this solution Helpfull? Yes (1) | No   

pawan  (9 years ago)

The diff. of age is +1 or -1 from each other so, we can take the ages of all four in a series like 1,2,3,4 or 2,3,4,5 as it is
Now let take their ages as 1,2,3,4

product of ages will be - 1*2*3*4 = 24
check condition 23+1 satisfies
25-1 satisfies
24/10 not= 0 not satisfies
24/23 not= 0 not satisfies
Now take the ages as 2,3,4,5
PRODUCT 2*3*4*5 = 120
Check Conditions 119+1 not satisfies
121-1 satisfies

ans. = square - 1

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Harekrishna Murari  (9 years ago)

suppose that ages are x,x+1,x+2,X=3
x*(x+1)*(x+2)*(x+3)=x^4 + 6x^3 + 11x^2 + 6x

now we can put 1,2,3.... any thing we will get a square-1

Is this solution Helpfull? Yes (1) | No (1)  

Moumita Das  (9 years ago)

1. prime number +1.

Is this solution Helpfull? Yes | No (18)  

Gaurab Kumar Jha  (9 years ago)

1. Prime number +1

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swati bharti  (9 years ago)

according to the auestion each sibling is 1 year older or younger so considering that their age is 2,3,4,5 we will get the product 120
hence 119+1
so the ans is +1

Is this solution Helpfull? Yes | No (12)  

tushar varshney  (9 years ago)

let youngest is of 1 year old then second will be of 2 year third will be of 3 year and oldest is of 4 year.multiply of these will be 24.so we have two option 1 and 2.if we have yongest as two year old option 2 is wrong.se option 1 is right answer.

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SARAN   (9 years ago)

ans is option 2
given qustn is each sibling one year old or young so ages will be 1,2,3,4 or 5,4,3,2 etc ... calculate ages multiplication 1*2*3*4=24 means 5^2-1 or 5*4*3*2=120 means 11^2-1..... i hope u may clear

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