1. Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56% of the sum of their marks. The marks obtained by them are
42,30
42,31
42,32
42,33
Answer: Option D
Explanation:
Let their marks be (x+9) and x.
Then, x+9 = 56/100(x + 9 +x)
=> 25(x+9)
=> 14 (2x + 9)
=> 3x = 99
=> x = 33.
So, their marks are 42 and 33
2. 2 is what percent of 50
2%
4%
6%
8%
Answer: Option B
Explanation:
2/50 * 100 = 1/25 * 100 = 4 %
3. Half of 1 percent written as decimal is
5
0.5
0.05
0.005
Answer: Option D
Explanation:
It will be 1/2(1%) = 1/2(1/100) = 1/200 = 0.005
4. If 15% of 40 is greater than 25% of a number by 2, the number is
14
16
18
20
Answer: Option B
Explanation:
15/100 * 40 - 25/100 * x = 2 or x/4 = 4 so x = 16
5. Raman's salary was decreased by 50% and subsequently increased by 50%. How much percent does he loss.
75
65
45
25
Answer: Option D
Explanation:
Let the origianl salary = Rs. 100
It will be 150% of (50% of 100)
= (150/100) * (50/100) * 100 = 75