How many numbers divisible by 4 lie between 70 and 203?

Answer 1

Smallest multiple

= 70/4 = 17.5 or 18

18 x 4 = 72

Largest multiple

= 203/4 =50.75

50 x 4 = 200

an = a + (n-1)d

an = 72 + (n-1)(4)

an = 33

Answer 2

The 18th multiple of 4 is 72.

The 50th multiple of 4 is 200.

The 18th through the 50th are all between 70 and 203. That's 33 of them.

Answer 3

(203 - 70)/4 = 33.25

Since 0.25 cannot be counted as one, then the number of numbers divisible by 4 is only 33.