Word Problems

781: The Sum of Four Numbers

I have four two-digit numbers written on my paper. The sum of these four numbers is less than 100.
True or false: each number is less than 25.
Bonus: If all the numbers on my paper are different, what is the largest number I could possibly have written?
To receive credit for your solution you must -write your short answer in a complete sentence
fully explain your reasoning (what did you think about to find your answer?)

2743: Choose Your Challenge

"I'm three days older than Jasmine, who lives next door. How much older are you than I am?" Zak asked his brother Abdul.
Abdul said, "I was six when you were born."
"But we don't have the same birthday, so you aren't exactly six years older. How many days older are you?"
Abdul thought for a few seconds and said, "Zak, I challenge you to figure out by how many days I'm older, and after you have finished, I'll set a challenge for myself and figure out by how many hours I'm older."
Each boy smiled thinking that he had the easier challenge.
Information:
Zak was born on March 3, 1994 at 1:00 p.m. at Forbes Hospital.
Abdul was born in the same hospital on November 9, 1987 at 10:30 a.m.
Question: How many days older is Adbul? Explain your method.
Extra: Which brother has the easier challenge? Why do you think so?