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?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

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?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

What number divided by 4 is the same as that number minus 4?

What's a single-digit number with no value?