Fill up :

`a/b = ( ak ) /( bk ) ` , and `5/7 = ( --- )/28`

Fill in the blanks : 6/7 + (-3/5) = ____ + 6/7

If (-5)/(7) = (x)/( 28) , find the value of x .

Using the property a/b =(ak)/(bk) , fill in the blanks by substituting proper numbers in the following . 6/(11) =(…)/(44) =(3)/(…)

Fill in the blanks: 5/7 div 5/7 = ___

There are two tanks A and B to fill up a water tank . The tank can be filled in 40 min , if both taps are on . The same tank can be filled in 60 min , if tap A alone is on . How much time will tap B alone take , to fill up the same tank ?

If two circles x^2 + y^2 + ax + by = 0 and x^2 + y^2 + kx + ly = 0 touch each other, then (A) al = bk (B) ak = bl (C) ab = kl (D) none of these

If (a+bk)/(a-bk) = (b+ck)/(b-ck) = (c-dk)/(c-dk) where k != 0 , a, b , c d gt 0 and none of them equals 1 , then

AK : FP :: XD : ? (a) SJ (b) CI (c) BH (d) TE

148. 7 : 28: : 2 : ?