a2zinterviews

16.	The expression (11.98 x 11.98 + 11.98 x X + 0.02 x 0.02) will be a perfect square for x equal to
	A.  0.02
	B.  0.2
	C.  0.04
	D.  0.4

Solution

Given expression = (11.98)2 + (0.02)2 + 11.98 x X. For the given expression to be a perfect square, we must have 11.98 x x = 2 x 11.98 x 0.02 or x = 0.04.

17.	4.036 divided by 0.04 gives
	A.  1.009
	B.  10.09
	C.  100.9
	D.  1000.1

Solution

= 4.036 / 0.04 = 403.6 / 4 = 100.9.

18.	A tailor has 3.75 metres of cloth and he has to make 8 pieces out of a metre of cloth. How many pieces can he make out of this cloth?
	A.  300
	B.  360
	C.  400
	D.  450

Solution

Length of each piece = (1/8)m = 0.125 m. ∴ Required number of pieces = (37.5 / 0.125) = (37.5 x 100 / 125) = 300.