Latest Elitmus Aptitude Question SOLUTION: Santa has all digit of odd no. Banta has all digit of even no. Santa squares his digit and add them . Banta also squares his digits and add them. Then what is the differnce of the

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(#M40151928) ELITMUS Numerical Ability question Number system Keep an EYE

Santa has all digit of odd no. Banta has all digit of even no. Santa squares his digit and add them . Banta also squares his digits and add them. Then what is the differnce of the two....

Asked In Elitmus akhil katiyar (9 years ago)

Unsolved Read Solution (5)

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Read Solution (5) :

Aakash Chandnani  (9 years ago)

As per gaurav if question was santa has all two digit odd nos and banta has all two digit even nos....
then soln is :

Santa - 11 13 15 17 19 21 ............................................. 99
Banta - 10 12 14 16 18 20 ............................................. 98

we need to calculate
(11^2 + 13^2 + 15^2 + 17^2 + 19^2 + 21^2 ............................................. 99^2 ) - (10^2 12^2 14^2 16^2 18^2 20^2............................................. 98^2 )

OR

= (11^2 - 10^2) + (13^2 - 12^2) + (15^2 - 14^2) + ............................... + (99^2 - 98^2)
= 21 + 25 + 29 + .................................... 197
this is an AP

so sum = n/2(a+l)

= 45/2(21+197)
= 4905 Ans

Is this solution Helpfull? Yes (14) | No   

Abhishek Tomar  (9 years ago)

sq of even no.'s (4+16+36+64+100)
sq of odd no.'s (1+9+25+49+81)

difference is 45

Is this solution Helpfull? Yes (4) | No (1)  

jeet  (9 years ago)

Difference should be 45

Is this solution Helpfull? Yes (2) | No (3)  

gaurav bajpai  (9 years ago)

question was santa hai all two digit odd nos and banta has all two digit even nos....
correct it plz

Is this solution Helpfull? Yes (2) | No   

priya gupta  (9 years ago)

difference is 55

Is this solution Helpfull? Yes | No   

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