Maths Questions

Hugo

1. Which of the following is/are true?
i.) 3%x15%=0.45%
ii.) 25%+35%=60%
iii.)40% is divided by 7=17.5%

A. i. only
B. i. and ii. only
C. i. and iii. only
D. all of them

2.When a number y si decreased by 75% to become 140. Find the value of y.
A. 560
B. 80
C. 105
D. 35

細薯

1.??
A. i. only
B. i. and ii. only
C. i. and iii. only
D. all of them

that means i must be correct??

2.A. 560

rogergeot

1. i) 3% x 15% = 3/100 x 15/100 = 45/10000 = 0.45
   ii) 25% + 35% = 25/100 + 35/100 = 60/100 = 60%
   iii) 40%/7 = 40/700 = 4/70 = 5.71%

So, the answer is B.

2. y(1-75%) = 140
      y(25%) = 140
                y= 140 x 100 /25
                y= 140 x 4
                y= 560

The answer is A.

oscar

好明顯，呢d數係form1數~

細薯

Originally posted by oscar at 2004-4-20 08:00 PM:
好明顯，呢d數係form1數~

maybe primary le some~~