How do you go from 98 to 720 using just one letter?
Look at this sequence from top to bottom. What is the next number in the sequence? 1 11 21 1211 111221 312211
A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396. What is the sum of the three digits?
Can you find out which number multiplied by itself will give the output as 12345678987654321?
John can place six large boxes or nine small boxes into a carton. Can you find out in how many cartons can he place sixty-six boxes in total?
I am a prime number. The double of myself is equal to the square of me. which number am I?
You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth. How long would it take for the machine to cut the roll if each cut took 4 secs?
Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol? 19834 -----: 187 15921 -----: 153 17561 -----: 139 13734 -----: ???
I am an odd number. Take away a letter and I become even. What number am I?
At a Society election for president, precisely 963 votes were cast. There is a total of 4 candidates that participate in the election. The winning candidate exceeds the opponents by 53, 79 and 105 votes. How many votes do each candidate gets?
Can you arrange four 9's and use at most 2 math symbols, to make the total 100?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
