Nova Math - Problem Set F: Number Theory

Question Name	Average time to answer (seconds)	Total correct answers	Total incorrect answers
Let a, b, and c be three integers, and let a be a perfect square. If a/b ... ...	200	38	15
If n > 2, then the sum, S, of the integers from 1 through n can be ... ...	154	31	23
Column A n is an odd number greater than 5 and a multiple of 5. Column ... ...	55	40	12
Which one of the following could be the difference between two numbers ... ...	113	44	8
A number, when divided by 12, gives a remainder of 7. If the same number ... ...	108	43	9
Let x be a two-digit number. If the sum of the digits of x is 9, then the ... ...	158	22	30
	26	48	3
Column A Column B The number of positive integers less than ... ...	59	42	9
If n3 is an odd integer, which one of the following expressions is an even ... ...	83	42	8
If the product of two integers is odd, then the sum of those two integers ... ...	70	47	3