My brother is 5 years older than I am. My sister is 3 years younger than I is. How old will my sister be when my brother is 29?

If I'm correct she will be 21

Step-by-step explanation:

Because first when your brother is 29 (-5 because your younger than him by 5 years) you will be 24 and then 24 - 3 (because your sister is younger than you by 3 years) = 21 years old. So, your sister will be 21 when your older brother is 29.

ok

step-by-step explanation:

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.