The H.C.F of the expressions x2 - 3x2 - 4 and x2 - 4x2 + x is
(1) x-1
(2) x+1
(3) x2-1
(4) x2 -3
(1) Ht. 8 inches (2) 6 ft. (3) 7 ft.6 inches (4) NONE OF THESE
(1) 12 (2) 48 (3) 84 (4) 108
Two numbers are in the ratio of 15 : 11. If their H.C.F. is 13, then the no.s are:
1) 75 and 55 .
2) 105 and 77
3) 11 and 15
4) 195 and 143
Two pipes A and B can fill a tank in 12 and 15 minutes respectively. Both are opened together but after 3 minutes the first is turned off. How much longer will the tank take to fill ?
1) 8 ΒΌ
2) 6 2/3
3) 5 1/3
4) 5 3/5
