Best Answer

27, 33, and 39. The pattern adds 6 each time

Q: What is the next three numbers in the pattern 9 15 21?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

42 123 243

6, 15, 24, 33, 42, 51, 60

12, 10 and 15 the are alternatively increased by 2 and 3

They are: 0, -5, -10

Each number is three times the previous number.

Related questions

42 123 243

The pattern is add three and then multiply by three. The next number is 174.

The numbers are halving each time, so the next three are 60, 30 and 15.

6, 15, 24, 33, 42, 51, 60

12, 10 and 15 the are alternatively increased by 2 and 3

They are: 0, -5, -10

The next three numbers in the sequence are 23, 25, and 27.

Each number is three times the previous number.

11, -10, 9

This sequence increases by multiplying each new number by 20. Use a calculator or break it down in your head, it's a lot quicker than going online for something like this or using other people to do your math homework! Look below for simple breakdown:0.75 X 20 = 15 (.75X10=7.5 & 7.5X2=15)15X20=300 (15X10=150 & 150X2 =300)then get the next one...

-3 0 3 then 6 9 12 15 18 21 and so on ...

-15 tn = (-1)n *3n for n = 1,2,3,...