Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?
Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.
Can you find out which number multiplied by itself will give the output as 12345678987654321?
Our product and our sum always give the same answer. Who are we?
Find the combined weight of the Cat, Dog and Rabbit in the given picture.
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?
Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.
If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?
Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?
What does this mathematical rebus means ?
The day before the 1996 U.S. presidential election, the NYT Crossword contained the clue “Lead story in tomorrow’s newspaper,” the puzzle was built so that both electoral outcomes were correct answers, requiring 7 other clues to have dual responses.
