Question

if u answer i will mark as brainliest​

Answer 1

Step-by-step explanation:

Less than 10 = 6

Less than 20 = 6 + 14 = 20

Less than 30 = 20 + 20 =40

Less than 40 = 40 + 21 = 61

Less than 50 = 61 + 9 = 70

Less than 60 = 70 + 5 = 75