If a and b are prime numbers, which of the following cannot be the sum of a and b?

F) 13

G) 16

H) 18

J) 25

K) 27

Explain which is faster: 10 centimeters/5 seconds or 10 centimeters/20 seconds.

Solve the inequality for x - 7 less than 5

How many one-thirds are in seven halves?

What is 5/8 to the lowest fraction?

X + 105 x+95 solve for x

Write the multiplication property use in the equation 100 X 1 = 100

what is 5309 divided by 43

Find angle E if angle E and angle F are supplementary, angle E = 2x + 5 and angle F = 5x - 38

How do I become better using mental math?

Alma and Blanca are playing a game where they roll a pair of fair six-sided dice and try to predict the outcomes. Blanca thinks that the probability of rolling a one and a five is greater than the probability of rolling a one or a five.