Quant Mania: Simplification & Series

Dear Readers,
Today we are presenting you Quant Mania on Simplification and Series which is very important for your upcoming exams. You may expect similar type of questions in your exams. Try to solve it.

Simplification & Series

Directions (Q. 1-5): What should come in place of the question mark in the following questions?

1. √? + 318 = 1518
a) 1440000
b) 1210000
c) 2890000
d) 2635000
e) None of these

2. 25% of 1200 = √? + 290
a) 15
b) 25
c) 36
d) 100
e) None of these

3. 40% of 80 + ? of 50% = 10% of 620
a) 60
b) 50
c) 80
d) 90
e) None of these

4. 8643 + 2559 – 4685 – 5 = ?
a) 6400
b) 6413
c) 6512
d) 6415
e) None of these

5. 92 + 91/2  = ? of 50%
a) 168
b) 170
c) 350
d) 160
e) None of these

Directions (Q. 6-10): In the following number series a wrong number is given. Find out the wrong number and answer the questions given.

6. 2      15     35     41     54     67
How much should be subtracted from the wrong number to make it correct?
a) 7
b) 10
c) 5
d) 9
e) None of these

7. 6     9     14     21     32
Which is the wrong number?
a) 6
b) 9
c) 14
d) 21
e) 32

8. 5     11     22     29     41
What is the ratio of the wrong number to twice the number preceding it?
a) 1:1
b) 1:2
c) 22:29
d) 41:29
e) None of these

9. 3     7     9     15     23
What will be the second number in the number series started with the wrong number?
a) 7
b) 9
c) 12
d) 18
e) 22

10. 35     34     26     19     13
What per cent of 35 is the wrong number?
a) 56
b) 49
c) 54
d) 55
e) 60

Answers

1. a;
? + 318 = 1518
? = 1200
? = (1200)2 = 1440000

2. d;
25% of 1200 = 300
? + 290 = 300
? = 300-290 = 10
? = 102 = 100

3. a;
40% of 80 + ? of 50% = 10% of 620
32 + ? of 50% = 62
? of 50% = 62 – 32  = 30
? = 60

4. c;

5. a;
92 + 91/2 = 81 + 3 = 84
? of 50% = 84
? = 168

6. a;
The series is +13
So, 35 is the wrong number.
7 should be subtracted from it to get the correct number.

7. e;
The series is +3, +5, +7, +9.
So, ‘32’ is the wrong number.

8. a;
The series is 22 + 1, 32 + 2, 42 + 3, 52 + 4, ….
So 22 is the wrong number. So the required ratio is 22: 22 = 1:1.

9. b;.
The series is +2, +4 , +6, +8, ……
So, ‘7’ is the wrong number.
The second number in the series starting with ‘7’ will be 7 + 2 = 9.

10. c;
The series is -14, -23, -32, -41.

Thanks.

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