12isbs math puzzle 225

1. Find the square root of 0.4?

2. If x% of 40%of 1000 is 300, find x?

Solution

1) 0.6324 approximately

2) 75

Explanation: 40% of 1000 is 400 and x% of 400 = 300 gives 4x=300 from which x=75.