The H.C.F. of `9/(10),(12)/(25),(18)/(35)` and `(21)/(40)` is `3/5` (b) `(252)/5` (c) `3/(1400)` (d) `(63)/(700)`

What is the value of (3)/(7) div (9)/(21) +2-(4)/(3)+(1)/(2)" of "(12)/(5) xx (25)/(18) div (5)/(9) ?

The orthocentre of the triangle with vertices (0,0),(3,4), and (4,0) is (a) (3,5/4) (b) (3,12) (c) (3,3/4) (d) (3,9)

The orthocentre of the triangle with vertices (0,0),(3,4), and (4,0) is (a) (3,5/4) (b) (3,12) (c) (3,3/4) (d) (3,9)

The H.C.F. of 204, 1190 and 1445 is (a) 17 (b) 18 (c) 19 (d) 21

If x % of (12)/5 is (18)/(25), then x= (a) 30 (b) 40 (c) 72 (d) 50

Verify each of the following: (i) ((5)/(7)xx (12)/(13))xx(7)/(18)= (5)/(7) xx ((12)/(13)xx(7)/(18)) (ii) (-13)/(24)xx((-12)/(5)xx(35)/(36))=((-13)/(24)xx(-12)/(5))xx (35)/(36) (iii) ((-9)/(5)xx (-10)/(3)) xx (21)/(-4) = (-9)/(5) xx ((-10)/(3) xx (21)/(-4))

Fill in the place holders: a. (24)/(40)= (square)/(5)= (12)/(square) b. (36)/(63)= (4)/(square)= (square)/(21) c. (5)/(7)= (square)/(28)= (35)/(square)

(3)/(5) of (4)/(7) of (5)/(9) of (21)/(24) of 504=?( a) 63 (b) 69 (c) 96 (d) 109 (e) None of these