4=4 what property is it?

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)

What is the base of the exponential expression of 4 to the power of 5

You draw a card at random from a deck that contains 33 black cards and 77 red cards.