🐍 Python problems

#401 While: number of digits 🔒 #402 How many times does the digit 0 appear? 🔒 #403 Collatz steps 🔒 #404 GCD (Euclid's algorithm) 🔒 #405 LCM 🔒 #406 Base 2 🔒 #407 When the sum goes over S 🔒 #408 When the sum of squares goes over S 🔒 #409 When a power of 2 goes over N 🔒 #410 Is it a prime number? 🔒 #411 Next prime number 🔒 #412 Read until 0: sum 🔒 #413 Savings 5% 🔒 #414 Divide by 2 until 0 🔒 #415 Digital root 🔒 #416 Armstrong number 🔒 #417 Perfect number 🔒 #418 Fibonacci: the n-th Fibonacci number (F₁ = F₂ = 1) 🔒 #419 Bacteria ×2 🔒 #420 Digit sum steps 🔒 #421 Trailing zeros of n! 🔒 #422 Words until stop 🔒 #423 Number + reversed number 🔒 #424 Is it a power of 2? 🔒 #425 Is the digit sum divisible by 3? 🔒 #426 Remove the digit 0 🔒 #427 Multiplicative persistence 🔒 #428 Numbers with digit sum 5 🔒 #429 While: sum of the digits 🔒 #430 How many times does the digit 1 appear? 🔒 #431 Base 3 🔒 #432 When a power of 3 goes over N 🔒 #433 Read until 0: count 🔒 #434 Savings 8% 🔒 #435 Divide by 3 until 0 🔒 #436 Fibonacci: the first Fibonacci number greater than N 🔒 #437 Bacteria ×3 🔒 #438 Is it a power of 3? 🔒 #439 Is the digit sum divisible by 5? 🔒 #440 Remove the digit 1 🔒 #441 Numbers with digit sum 6 🔒 #442 While: product of the digits 🔒 #443 How many times does the digit 2 appear? 🔒 #444 Base 4 🔒 #445 When a power of 4 goes over N 🔒 #446 Read until 0: largest 🔒 #447 Savings 10% 🔒 #448 Divide by 4 until 0 🔒 #449 Fibonacci: how many Fibonacci numbers are not greater than N (in the order 1, 1, 2, 3, 5, ..., counting both 1s) 🔒 #450 Bacteria ×4 🔒 #451 Is it a power of 4? 🔒 #452 Is the digit sum divisible by 7? 🔒 #453 Remove the digit 2 🔒 #454 Numbers with digit sum 7 🔒 #455 While: reversed number (example: 1230 → 321) 🔒 #456 How many times does the digit 3 appear? 🔒 #457 Base 5 🔒 #458 When a power of 5 goes over N 🔒 #459 Read until 0: average (2 decimal places) 🔒 #460 Savings 12% 🔒 #461 Divide by 5 until 0 🔒 #462 Bacteria ×5 🔒 #463 Is it a power of 5? 🔒 #464 Is the digit sum divisible by 9? 🔒 #465 Remove the digit 3 🔒 #466 Numbers with digit sum 8 🔒 #467 While: palindrome check (`Yes`/`No`) 🔒 #468 How many times does the digit 4 appear? 🔒 #469 Base 6 🔒 #470 When a power of 6 goes over N 🔒 #471 Savings 15% 🔒 #472 Divide by 6 until 0 🔒 #473 Is it a power of 6? 🔒 #474 Is the digit sum divisible by 11? 🔒 #475 Remove the digit 4 🔒 #476 Numbers with digit sum 9 🔒 #477 While: largest digit 🔒 #478 How many times does the digit 5 appear? 🔒 #479 Base 7 🔒 #480 When a power of 7 goes over N 🔒 #481 Savings 20% 🔒 #482 Divide by 7 until 0 🔒 #483 Is it a power of 7? 🔒 #484 Remove the digit 5 🔒 #485 Numbers with digit sum 10 🔒 #486 While: smallest digit 🔒 #487 How many times does the digit 6 appear? 🔒 #488 Base 8 🔒 #489 When a power of 8 goes over N 🔒 #490 Divide by 8 until 0 🔒 #491 Is it a power of 8? 🔒 #492 Remove the digit 6 🔒 #493 Numbers with digit sum 11 🔒 #494 While: number of even digits 🔒 #495 How many times does the digit 7 appear? 🔒 #496 Base 9 🔒 #497 When a power of 9 goes over N 🔒 #498 Divide by 9 until 0 🔒 #499 Is it a power of 9? 🔒 #500 Remove the digit 7 🔒