- 33 1/3% OF 240?

A.) 72 B.) 16 C.) 80 D.) None of these Answer: Option 'C'

33 1/3 % = 1/3

1/3 × 240 = 80 - 11 1/9 % of 900?

A.) 100 B.) 20 C.) 81 D.) None of these Answer: Option 'A'

11 1/9 % = 1/9

1/9 × 900 = 100 - Express 2/5 as rate percent:

A.) 80% B.) 60% C.) 40% D.) none of these Answer: Option 'C'

2/5 × 100 % = 200/5 % = 40 % - Express 3/4 as rate percent.

A.) 80% B.) 30% C.) 75% D.) 25% Answer: Option 'C'

3/4 × 100 = 300/4 % = 75 % - What percent is 70 of 280?

A.) 25% B.) 50% C.) 75% D.) None of these Answer: Option 'A'

70/280 = 1/4

1/4 × 100 = 25 % - What percent is 120 of 90?

A.) 132 1/3% B.) 132 2/3% C.) 133 1/3% D.) None of these Answer: Option 'C'

120/90 = 4/3

4/3 × 100 = 400/3 = 133 1/3 % - What percent is 5 gm of 1 kg?

A.) 0.05% B.) 0.5% C.) 0.005% D.) None of these Answer: Option 'B'

1 kg = 1000 gm

5/1000 × 100 = 500/1000

=1/2 = 0.5 % - What percent is 36paisa's of 12 rupees?

A.) 3% B.) 0.03% C.) 0.3% D.) None of these Answer: Option 'A'

12 Rupees = 1200paisa's

36/1200 × 100 = 3/12

12/3 = 3 % - A number increased by 20% gives 480. The number is

A.) 380 B.) 420 C.) 400 D.) 300 Answer: Option 'C'

Formula = TOTAL=100% ,INCRESE = "+" DECREASE= "-"

A number means = 100 %

That same number increased by 20 % = 120 %

120 % -------> 480 (120 × 4 = 480)

100 % -------> 400 (100 × 4 = 400) - 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. What are the marks obtained by them?

A.) 42, 33 B.) 44, 36 C.) 43, 36 D.) 42, 36 Answer: Option 'A'

Let the marks secured by them be x and (x + 9)

Then sum of their marks = x + (x + 9) = 2x + 9

Given that (x + 9) was 56% of the sum of their marks

=>(x+9) = 56/100(2x+9)

=>(x+9) = 14/25(2x+9)

=> 25x + 225 = 28x + 126

=> 3x = 99

=> x = 33

Then (x + 9) = 33 + 9 = 42

Hence their marks are 33 and 42

Students can learn and improve on their Cognitive and Mathematical Fast Calculation skills and prepare for competitive examinations like...

- All I.B.P.S and Public Sector Bank Competitive Exam
- Common Aptitude Test (CAT) Exams
- UPSC Paper-II or CSAT Exams
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- Railway Competitive Exam
- University Grants Commission (UGC)
- Career Aptitude Test (IT Companies) and etc.

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