TRY THESE SUMS !

1) THE HCF OF 2 NUMBERS IS 20 AND THEIR LCM IS 60, IF THE FIRST NUMBER IS 20, WHAT IS THE OTHER NUMBER ?
2) SOLVE x + 1/5 = 8
3) EVALUATE : 0.8 X 0.67 + 2.5 X 10
4) IF X = 4 FIND THE VALUE OF 8X + 90 + 9X
5) EVALUATE 0.009 X 1000 + 3.09 X 100