Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?
A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.
Can you find how bias is the floor in this case?
Find out the missing number in the picture attached:
A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?
Can you find a number that lies one third of the distance between 1/3 and 2/3?
Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?
A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.
Can you calculate the distance travelled by each tyre on that journey?
A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?
If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?
Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211
You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:
Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10
Now, how many of each must you buy to fulfil the condition given?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
