1. Rahul's Mathematics test had 75 problems, 10 arithmetic, 30 algebra, 35 geometry problems. Although he answered 70% of arithmetic, 40% of arithmetic and 60% of geometry problems correctly, still he got less than 60% problems right. How many more questions he would have to answer more to get passed
5
6
7
8
Answer: Option A
Explanation:
Number of questions attempted correctly = (70% of 10 + 40% of 30 + 60% of 35)
= 7 + 12 + 21 = 40.
Questions to be answered correctly for 60% = 60% of total quations
= 60 % of 75 = 45.
He would have to answer 45 - 40 = 5
2. What is 15 percent of 34
5.10
4.10
3.10
2.10
Answer: Option A
Explanation:
It will be 15% of 34
= (15/100) * 34 = 5.10
3. If x% of y is 100 and y% of z is 200, then find the relation between x and z.
z = x
2z = x
z = 2x
None of above
Answer: Option C
Explanation:
It is , y% of z = 2(x% of y)
=> yz/100 = 2xy/100
=> z = 2x
4. Two numbers are less than third number by 30% and 37% respectively. How much percent is the second number less than by the first
8%
9%
10%
11%
Answer: Option C
Explanation:
Let the third number is x.
then first number = (100-30)% of x
= 70% of x = 7x/10
Second number is (63x/100)
Difference = 7x/10 - 63x/100 = 7x/10
So required percentage is, difference is what percent of first number