If x is a positive integer, which of the following must be an even integer that is twice the value of an odd integer. A. 2x
B. 2x + 1
C. 2x + 2
D. 4x + 1
E. 4x + 2

An unknown number of kids and buses are getting assigned. when assigning 4 kids to each bus, there are 2 kids that aren't placed in a bus. when assigning 8 kids to each bus, there are 2 empty buses. how many total kids are there?

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?