24
It can have up to 5 digits.
2
no, it matters with the number not digits
The greatest 4-digit number with no repeated digits is... 9876
9,999,876 is the greatest seven-digit number using four different digits.
63
It can have up to 5 digits.
98
Six.
2
no, it matters with the number not digits
All numbers are made with digits and there is no limit on how big they can be. So there is no greatest number.
The greatest 4-digit number with no repeated digits is... 9876
The greatest whole number with 5 digits is 99,999. The next greater whole number is 100,000, which is the least whole number having 6 digits.
Find the greatest product of five consecutive digits in the 1000-digit number.7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450
52 is a number whose digits have a product of 10.
It is 999999998.