Replace the (?) with the correct mathematical signs to make the expression equal to 59.
18 ? 12 ? 4 ? 5 = 59
If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?
Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211
In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.
What is next number in the pattern below:
131 517 192 123 ?
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?
Can you find a number that lies one third of the distance between 1/3 and 2/3?
If 21x = 79x, what is the value of x?
If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?
What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?
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?
In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki
