Kwan has modeled a number that is less that 999 his model has twice as many 100-block as 10-blocks It has twice as many 10-blocks as 1-blocks What is the number?

Answer 1

n=unknown 1-block

n+2(n)+2(2n)

n+2n+4n Thats the answer because a number was never given. If you want to assume theres an invisible 1 infront of n then heres the problem for that

1n+2(1n)+2(2n)

1n+2n+4n so answer would be 421

BUT you can make it complicated if read the question again. Although they never gave a number, the question wrote 1-blocks as a plural (notice the s at the end of blocks). So assuming there is more than one 1-block we can say there are two 1-blocks. Lets solve this one

n=2 (since theres more than 1 ones blocks)

n+2(n)+2(2n)

2+2(2)+2(4)

2+4+8 so the answer would be 842

These two answers are possible and they are both under 999.