model 1 simple percentage questions Section-Wise Topic Notes With Detailed Explanation And Example Questions

MOST IMPORTANT quantitative aptitude - 11 EXERCISES

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The following question based on percentage topic of quantitative aptitude

Questions : If x% of $25/2$ is 150, then the value of x is :

(a) 1400

(b) 1500

(c) 1000

(d) 1200

The correct answers to the above question in:

Answer: (d)

x% of $25/2$ = 150

$x/100 × 25/2$ =150

$x/8$ = 150

x = 150 × 8 = 1200

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Read more simple percentage Based Quantitative Aptitude Questions and Answers

Question : 1

If 20% of (P + Q) = 50% of (P –Q), then find P : Q

a) 7 : 5

b) 5 : 7

c) 7 : 8

d) 7 : 3

Answer: (d)

${20(P + Q)}/100 = 50/100(P – Q)$

${P + Q}/{P - Q} = 5/2$

${2P}/{2Q} = {5 + 2}/{5 - 2}$

[By componendo & dividendo]

$P/Q = 7/3$ or 7 : 3

Question : 2

The time duration of 1 hour 45 minutes is what percent of a day?

a) 8.3 %

b) 8.24 %

c) 7.218 %

d) 7.292 %

Answer: (d)

1 hour 45 minutes = 1$3/4 hours = 7/4$ hours

1 day = 24 hours

Required per cent = ${7/4}/24 ×100$

= $7/{4 × 24}$× 100

= 7.292%

Question : 3

If p% of p is 36, then p is equal to :

a) 60

b) 15

c) 3600

d) 600

Answer: (a)

p% of p = 36

$p/100$× p = 36

$p^2$ = 3600

p = 60

Question : 4

If 15% of (A + B) = 25% of (A – B), then what per cent of B is equal to A?

a) 200%

b) 400%

c) 10%

d) 60%

Answer: (b)

15% of (A + B) = 25% of (A – B)

$15/100(A + B) = 25/100(A - B)$

15 (A + B) = 25 (A – B)

15 A + 15 B = 25A – 25 B

10 A = 40 B

A = 4 B

Now, let x% of B is equal to A

$x/100×B =A ⇒ x/100×B =4B$

x = 400%

Question : 5

0.15% of 33$1/3$% of Rs.10000 is :

a) Rs.0.05

b) Rs.105

c) Rs.5

d) Rs.150

Answer: (c)

0.15% of 33$1/3$% of Rs.10000

=$0.15/100 × 100/300 × 10000$= Rs.5

Question : 6

If 20% of A = 50% of B, then what per cent of A is B ?

a) 25%

b) 15%

c) 30%

d) 40%

Answer: (d)

20% of A = 50% of B

2A = 5B ⇒ A = ${5B}/2$

Let B is x % of A.

${5B}/2 × x/100$= B

x = $200/5$ = 40%

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