Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

a pack contains n cards numbered 1 to n .Two consecutive cards are removed from the pack and sum of remaining card is 1224.If smaller of number on the removed card is k.Find value of k-20

a pack contains n cards numbered 1 to n .Two consecutive cards are removed from the pack and sum of remaining card is 1224.If smaller of number on the removed card is k.Find value of k-20

Grade:11

1 Answers

Abhishek Singh
103 Points
6 years ago
its iit 2013 integer type question
acc to given condition n
n(n+1)/2 -(k)-(k+1)=1224
get k= n(n+1)-2450 / 4
 since n should be such that n(n+1)>2450 and k is integer only n= 50 satisfies , 
then k= 25 and  k-20 = 5

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free