Solve These Tricky Numerical Puzzles
Seven mind-bending problems that blend arithmetic with clever twists.
Quiz Questions
Answer all questions below and test your knowledge.
- 1
When multiplied by 4, its digits appear in reverse order. Identify the number.
- 2
A sequence starts 2, 3, 5, 7, 11, … Each term after the first two is the smallest prime greater than the sum of the two preceding terms. What is the seventh term?
- 3
In a 5×5 magic square using the numbers 1 to 25 each exactly once, what constant sum does every row and column share?
- 4
Which three‑digit number equals the sum of the factorials of its digits?
- 5
A bag contains red and blue marbles. The chance of drawing two marbles of the same color without replacement is one half. If red marbles are twice the number of blue marbles, how many marbles are in the bag?
- 6
Find the smallest positive integer N such that N divided by 2 leaves remainder 1, by 3 leaves remainder 2, by 4 leaves remainder 3, and by 5 leaves remainder 4.
- 7
A three‑digit integer equals the sum of the cubes of its digits. Which number satisfies this property?
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