Question

solve this question paper of 8th class

Answer 1

8)multiple of 4= 5/20=1/4
b) prime number=8/20=2/5
9)The least square number divisible by 12,15 and 18=900
11)let the angles be x.
Then 2x+1x=180
3x. =180
x. =180/3
x. =60
Hence <A=120 degree
<b=60 degree
<c+<b=180
x+60=180
x=180-60
x=120
<d+<c=180
x+120=180
x=180-120
x=60
Thus <a=120,<b=60,<c=120 and <d=60
1)lcm of 2 and 3=6
3x-2x/6=5
x=30

Answer 2

x/2 - x/3 = 5
= 3x-2x/6=5 
=x/6=5
=x=6*5
=x=30

25x2 - 16 y2
(5x+4Y)(5x-4y)

three consucative sum of 183

x+x+1+x+2=183
3x+3=183
3x=183-3
3x=180
x=180/3
x=60