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Conundrum Riddles With Answers 1 : Hard Maths Puzzle
Difficulty ★★★★☆        Popularity ★★★★☆

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?
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Conundrum Riddles With Answers 2 : Weighing Balance Puzzle
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You can place weights on both side of weighing balance and you need to measure all weights between 1 and 1000. For example if you have weights 1 and 3,now you can measure 1,3 and 4 like earlier case, and also you can measure 2,by placing 3 on one side and 1 on the side which contain the substance to be weighed. So question again is how many minimum weights and of what denominations you need to measure all weights from 1kg to 1000kg.

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Conundrum Riddles With Answers 3 : Tricky Equation Puzzle
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Can you arrange four 9's and use of atmost 2 math symbols , make the total be 100?
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Conundrum Riddles With Answers 4 : Maths Logical Problem
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Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?
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Conundrum Riddles With Answers 5 : Maths Brain Twister
Difficulty ★★★★☆        Popularity ★★★★☆

Two natural numbers are having a sum less than 100 and are both greater than one.

Ned knows the product of the numbers and Shawn knows the sum of numbers.

The following conversation takes place between them:
Ned: 'I am not aware of those numbers.'
Shawn: 'I knew you wouldn't be. I am not aware myself.'
Ned: 'Now I know them!'
Shawn: 'Now I know them, too!'

What are the two numbers?
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Conundrum Riddles With Answers 6 : Tough Probability Interview Question
Difficulty ★★★★☆        Popularity ★★★★☆

There is a country where everyone wants a boy. Every family continue to have babies till a boy is born. If the probability of having a girl or a boy is the same, what is the proportion of boys to girls after some time in that country?
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Conundrum Riddles With Answers 7 : Challenging Math Equations Puzzle
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We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

0 0 0 = 6
1 1 1 = 6
2 + 2 + 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6
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Conundrum Riddles With Answers 8 : February Series Question
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Find The Next Number
12 13 15 17 111 113 117 119 123 ?
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Conundrum Riddles With Answers 9 : Smart Math Problem
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As they say, beggars can't be choosers, in fact beggar take what they can get. A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?
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Conundrum Riddles With Answers 10 : Brain Twister Puzzle
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2+3=8,
3+7=27,
4+5=32,
5+8=60,
6+7=72,
7+8=??

Solve it?
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