1. 1,2,3,6 2. 1,3,9 3. 1,2,5,10 4. 1,2,3,4,6,12 5. 1,3,7,21 6. 1,2,3,6,9,18 7. 8,16 8. 1,5,25 9. 1,31 10. 3x3 11. 5x5 12. 2x2x2 13. 14 is a composite number 14. 2x2x2 15. 3x5 16. 5 is a prime number 17. 20 is a composite number 18. 2x13
x=7, so the smaller number is 7 and the larger number is 21.
Step-by-step explanation:
x=3x+5=33
Let x=3:
(3)+3(3)+5=3+9+5=17, not 33, so x is not 3
Let x=5:
(5)+3(5)+5=5+15+5=25, not 33, so x is not 5
Let x=7:
(7)+3(7)+5=7+21+5=33, so x=7
Let x=9:
(9)+3(9)+5=9+27+5=41, not 33, so x is not 9
Therefore x=7. Because x represents the smaller number, and the larger number is 3 times the smaller number, the smaller number is 7 and the larger number is 3(7)=21.