"How many numbers containing the number 4 are between 1 and 10000000"

Question

need an equation to solve the problem

Answer 1

that top number be 10,000,000=10 milyun... but 10,000,000 dont hav a 4, so the reel top be 9,999,999... & then, evree digit is repeeted the same number times... sept maebee 0 & 1.... thus, number 4's=number 3's=number2's=number 5's,... =9,999,999/10... =999,999.9... or maebee the anser=1,000,000