Will You Solve These 15 Tricky Problems?
41 21 31 12 On the first day of the month, I kept a dollar in my piggy bank. On the second, I kept two dollars and on the third, I kept three and so on. On my birthday, I had a total of 276 dollars in my piggy bank. Can you find out on which day of the month was my birthday?
15 Qs