Posted by **Elena** on Monday, September 8, 2008 at 9:11pm.

Grade 7 question:

I am a two-digit prime number

I am one less than a multiple of 10

If you add 30 to me you get another prime number

Who am I _________?

- Math Prime Numbers -
**bobpursley**, Monday, September 8, 2008 at 9:17pm
you can try 19, 29, 59, 79, 89. That will start you. On your own, figure out why I selected those.

- Math Prime Numbers -
**Elena**, Monday, September 8, 2008 at 9:44pm
Thank You !

- Math Prime Numbers -
**ryan dale**, Wednesday, September 24, 2008 at 8:57pm
they all end in 9 and are all multiples of a number:P ahahaah

- atubrk tbif -
**atubrk tbif**, Saturday, January 17, 2009 at 1:43am
umnfip fgbiyc nizkedq hrvpsx ipvkeonur apojvsx bchyned

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