A shopkeeper by selling 20 Timex watches, earns a profit equal to the selling price of 4 Timex watches. His profit percentage is
1). 20 percent
2). 25 percent
3). 40 percent
4). 15 percent
The perimeter of a square is 40 cm, find its area?
1). 100 sq cm
2). 25 sq cm
3). 50 sq cm
4). 160 sq cm
A hard coal containing little volatile matter is called ______.
1). Loess
2). Anthracite
3). Atoll
4). Lava
Atomic number of which of the following elements is greater than that of Iron?
1). Manganese
2). Cobalt
3). Calcium
4). Chromium
If 2x + 2(4 + 3x) < 2 + 3x > 2x + $\frac{x}{2}$; then x can take which of the following values?
1). -3
2). 1
3). 0
4). -1