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Both m and n are positive integers.

Quantity A

The remainder when (m+n) is divided by 2

Quantity B

The remainder when ($$m^{n}$$ is divided by 2


x < y, the remainder of x when divided by 9 is equal to the remainder of y when divided by 9.

Quantity A

The remainder when x is divided by 3

Quantity B

The remainder when y is divided by 3


The remainder is 30 when 6n is divided by 75, which of the following could be the remainder when 7n is divided by 75?

Indicate all such numbers.
n=4$$(x+20)^{2}$$-1, where x is a positive integer. Which of the following statements must be true?

Indicate all such statements.
What is the units digit of $$23^{21}$$-23?
What is the units digit of the positive difference between $$32^{19}$$ and 32?
What is the units digit of 5$$x^{3}$$, where x is a positive even integer?
What is the units digit of $$2^{2012}$$+$$3^{2012}$$+$$5^{2012}$$+$$7^{2012}$$?
What is the units digit of the positive difference between $$3^{7}*5^{4}*7^{11}$$ and $$4^{2}*5^{3}$$*11?
$$x$$, $$n$$ and $$k$$ are integers, $$0 \lt x \lt10^{7}$$, $$x=n^{k}$$, and the units digit of $$x$$ is $$5$$. $$x$$ is both a perfect square and a perfect cube. What is the value of $$x$$?
If $$T=4n^{2}+3$$ and $$n$$ is an integer, which of the following could be the units digit of $$T$$?

Indicate all such digits.

What is the remainder when $$3^{100}$$ is divided by 8?
What is the remainder when $$3^{27}$$ is divided by 5?
What's the remainder when $$9^{78}$$ is divided by 5?
x and y are positive integers less than 30 where x is a prime, y is odd but not a prime.

Which of the following CANNOT be x+y?
mn=p, where p is a prime. What is the value of m+n in terms of p?
The sum of two prime numbers is 43.

Quantity A

The product of the two prime numbers

Quantity B

83


Both m and n are primes, m < n, and m+n is an odd number

Quantity A

m

Quantity B

3


The number of children in a family is a prime number and is less than 10. If there are one more boys than girls and both the number of boys and girls are primes, then how many children does the family have?

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