logic puzzles with answers - Wikitechy https://www.wikitechy.com/interview-questions/tag/logic-puzzles-with-answers/ Interview Questions Tue, 07 Sep 2021 10:59:18 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png logic puzzles with answers - Wikitechy https://www.wikitechy.com/interview-questions/tag/logic-puzzles-with-answers/ 32 32 My 1st friend gave me 1000 and 2nd gave me 500. I have lost 1000 rupees then i purchased something with the cost of 300 and gave 100,100 both friends.what is the remaining amount that I should pay them back ? https://www.wikitechy.com/interview-questions/puzzles/my-1st-friend-gave-me-1000-and-2nd-gave-me-500-i-have-lost-1000-rupees-then-i-purchased-something-with-the-cost-of-300-and-gave-100100-both-friends-what-is-the-remaining-amount-that-i-should-pay-the/ https://www.wikitechy.com/interview-questions/puzzles/my-1st-friend-gave-me-1000-and-2nd-gave-me-500-i-have-lost-1000-rupees-then-i-purchased-something-with-the-cost-of-300-and-gave-100100-both-friends-what-is-the-remaining-amount-that-i-should-pay-the/#respond Fri, 06 Aug 2021 08:40:43 +0000 https://www.wikitechy.com/interview-questions/?p=1621

My 1st friend gave me 1000 and 2nd gave me 500. I have lost 1000 rupees then i purchased something with the cost of 300 and gave 100,100 both friends. 1st friend remaining 900 and 2nd remaining 400 900+400+300=1600 why ?

You had given Rs.100 to my both friends. so now you have to give only 900+400.
So total = 900 + 400 + 100 + 100 = 1500

]]> https://www.wikitechy.com/interview-questions/puzzles/my-1st-friend-gave-me-1000-and-2nd-gave-me-500-i-have-lost-1000-rupees-then-i-purchased-something-with-the-cost-of-300-and-gave-100100-both-friends-what-is-the-remaining-amount-that-i-should-pay-the/feed/ 0 A group of friends goes for dinner and gets bill of Rs 2400. Two of them says that they have forgotten their purse so remaining make an extra contribution of Rs 100 to pay up the bill. Tell the no. of person in that group ? https://www.wikitechy.com/interview-questions/puzzles/a-group-of-friends-goes-for-dinner-and-gets-bill-of-rs-2400-two-of-them-says-that-they-have-forgotten-their-purse-so-remaining-make-an-extra-contribution-of-rs-100-to-pay-up-the-bill-tell-the-no-of/ https://www.wikitechy.com/interview-questions/puzzles/a-group-of-friends-goes-for-dinner-and-gets-bill-of-rs-2400-two-of-them-says-that-they-have-forgotten-their-purse-so-remaining-make-an-extra-contribution-of-rs-100-to-pay-up-the-bill-tell-the-no-of/#respond Fri, 06 Aug 2021 08:30:16 +0000 https://www.wikitechy.com/interview-questions/?p=1618

A group of friends goes for dinner and gets bill of Rs 2400. Two of them says that they have forgotten their purse so remaining make an extra contribution of Rs 100 to pay up the bill. Tell the no. of person in that group ?

Let ‘x’ be the number of perons in the group and let ‘y’ be amount per head which they have to pay.
Then xy = 2400.
or y = 2400/x
Since two friends have forget the purse, x-2 persons should share the total amount(2400).

If they share, they have to make an extra contribution of Rs 100 to pay up the bill That is x-2 persons should pay y+100 each
or (x-2)(y+100) = 2400
or y+100 = 2400/(x-2)
or y = 2400/(x-2) – 100

Therefore we have got two equations namely,
y= 2400/x and
y = 2400/(x-2) – 100

Comparing these two, we get
2400/x = 2400/(x-2) – 100

Solving this we get
x^2 – 2x -48 = 0
or (x-8) (x+6) = 0
or x = 8 or x = -6

Since ‘x’ denote the number of persons, it should be positive.
So, x = 8.

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