#311 - GK FAQ Riddle
Can you name some countries which do not have the alphabet 'A' in it. ?
Belgium, Chile, Fiji, Egypt
#312 - Infosys Logic Interview Question
This was asked in an interview of Infosys.
Interviewer has given me 100 marbles(50 white and 50 black) and two empty boxes.
He then told me that he will leave the room and i need to place all the marbles in two boxes.
And When he come back, he will draw a marble from any of the two box and if the marble is black i will be hired.
Also
* No box can be empty.
* All 100 marbles must be placed in one of the two boxes.
So whats should i have done ?
One black marble in one box, the other 99 marbles in the other box
#313 - Picture Number Pattern Sequence
Whats the next number in the below number sequence pattern.
1113213211
its like you call it out
one one => 11
two one => 21
and so on
#314 - Tricky Logic Riddle
In my garden, i have many trees but only one of them is mango tree.
In this mango trees, there are some mangoes(as expected).
But after a strong wind, there are neither mangoes on tree nor on ground.
Explain ?
Solution
At first, there were 2 mangoes on the tree. After the wind blew, one mangoe fell on the ground. So there where no mangoes on the tree and there were no mangoes on the ground.
*mangoes => more than one mango
Another solution(non tricky one)
The wind blew so hard that the mangoes fell of the tree and blew along the ground.
#316 - Hard Number Series Aptitude Riddle
What is the next number in the series.
15 29 56 108 208 ?
400
Explanation:
15
2*15-1 => 29
2*29-2 => 56
2*56-4 => 108
2*108-8 => 208
2*208-16 => 400
#317 - Interesting Maths Puzzle
A women walks into a bank to cash out her check.
By mistake the bank teller gives her rupee amount in change, and her paise amount in rupees.
On the way home she spends 5 paise, and then suddenly she notices that she has twice the amount of her check.
How much was her check amount ?
The check was for Rupees 31.63.
The bank teller gave her Rupees 63.31
She spent .05, and then she had Rupees 63.26, which is twice the check.
Let x be the rupees of the check, and y be the paise.
The check was for 100x + y paise
He was given 100y + x paise
Also
100y + x - 5 = 2(100x + y)
Expanding this out and rearranging, we find:
98y = 199x + 5
or 199x ≡ -5 (mod 98)
or 98*2*x + 3x ≡ -5 (mod 98)
3x ≡ -5 ≡ 93 (mod 98)
this quickly leads to x = 31
#318 - Hard Logic Probabilty Puzzle
Bruna was first to arrive at a 100 seat theater.
She forgot her seat number and picks a random seat for herself.
After this, every single person who get to the theater sits on his seat if its available else chooses any available seat at random.
Neymar is last to enter the theater and 99 seats were occupied.
Whats the probability what Neymar gets to sit in his own seat ?
1/2
one of two is the possibility
1. If any of the first 99 people sit in neymar seat, neymar will not get to sit in his own seat.
2. If any of the first 99 people sit in Bruna's seat, neymar will get to sit in his seat.
#320 - Logical Maths Picture Puzzle
Solve the maths equation in the picture below by placing the numbers 1 through 9 into the boxes so that all the 3 equations are correct.
There are six unique answers
Ans1:
7 x 4 = 28
36 / 4 = 9
1 + 4 = 5
Ans2:
9 x 4 = 36
28 / 4 = 7
1 + 4 = 5
Ans3:
3 x 8 = 24
56 / 8 = 7
1 + 8 = 9
Ans4:
7 x 8 = 56
24 / 8 = 3
1 + 8 = 9
Ans5:
4 x 8 = 32
56 / 8 = 7
1 + 8 = 9
Ans6:
7 x 8 = 56
32 / 8 = 4
1 + 8 = 9