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Questions and answers by
Mr. Alexander
Questions (24)
What is $1000000_{16} - 8D6A7B_{16}$ in base 16?
(You do not need to include the subscript 16 in your answer.)
1 answer
1,344 views
Find a base 7 three-digit number which has its digits reversed when expressed in base 9.
(You do not need to indicate the base
3 answers
1,598 views
Express $3.\overline{4}_{13}$ as a base 10 fraction in reduced form.
6 answers
4,957 views
Suppose I have a bag with 10 slips of paper in it. Eight of these have a 2 on them and the other two have a 4 on them.
How many
1 answer
1,440 views
Suppose we have a bag with 10 slips of paper in it. Eight of these have a 2 on them and the other two have a 4 on them.
What is
1 answer
904 views
Hi! I need urgent help for these questions here. They have a deadline for today and I have no idea how to solve them
(a). Suppose
5 answers
871 views
(a) A cube is painted red on all six sides, then cut into 125 smaller congruent cubes.
How many of the small cubes are painted
2 answers
791 views
One member of the debate team is going to be chosen President. Each member is equally likely to be chosen. The probability that
2 answers
933 views
(a) A cube is painted red on all six sides, then cut into 125 smaller congruent cubes.
How many of the small cubes are painted
2 answers
1,158 views
A prime number less than 100 is selected randomly. What is the probability that its square has units digit 7?
1 answer
962 views
The fifth term of an arithmetic sequence is 9 and the 32nd term is -84. What is the 23rd term?
0 answers
594 views
Whenever Deven and Laura owe each other money, they "pay" each other using stickers. They've agreed that a Harry Potter sticker
3 answers
2,245 views
What is the difference between the sum of the first 400 even counting numbers and the sum of the first 400 odd counting numbers?
0 answers
702 views
Agents J and K work in a long hallway with 4000 equally-spaced, consecutive offices. The agents decide to walk toward each other
0 answers
931 views
Annie loves giving away puppies. When her friend Bobby walks by, she instantly gives him 50% of her puppy stash. Bobby, stunned
2 answers
969 views
The Master Chief collects spiders and starfish. If his spiders have 8 legs and his starfish have 5 legs, how many starfish must
15 answers
3,721 views
A wooden plank is 5 feet long and 1 1/2 inches thick. To make the plank 1 1/8 inches thick, a carpenter removes the same
2 answers
756 views
Whenever Deven and Laura owe each other money, they "pay" each other using stickers. They've agreed that a Harry Potter sticker
2 answers
812 views
Suppose $A$ and $B$ are digits for which the product of the two-digit numbers $\underline{2A}$ and $\underline{AB}$ is 1971.
3 answers
3,808 views
Find the largest three-digit number that can be written in the form $3^m + 2^n$, where $m$ and $n$ are positive integers.
1 answer
832 views
One leg of a right triangle has a length of 15 m. The other sides have lengths that are consecutive integers. Find the number of
1 answer
886 views
How many 3-digit numbers have the units digit larger than the tens digit?
2 answers
1,027 views
Find the largest three-digit number that can be written in the form 3^m + 2^n, where m and n are positive integers.
2 answers
5,334 views
Tom took five math tests and got an integer score on each of them. He never scored higher than 90, and his lowest score was the
12 answers
869 views
Answers (4)
Cause I tried entering the problem, it was wrong :(
I do not know very well. Help me~
try again please
that was not quite right
