M4maths Previous Puzzles

18 Aug 2021 Fill the blank

Fill the blank space
4, 5, 12, 15, ...., 45, 108, 135

OPtion

2) 35
3) 36
4) 40
5) 45
6) 48
7) 55
8) 58
9) 60
10)none of these

Solution

Two series are there.
Starting from 4,5
Next numbers are 3 times of 4,5 .. i.e 12,15
Next numbers are 3 times of 12,15...i.e. 36,45
Next numbers are 3 times of 36,45.... 108,135

so blank space number is 36.

Correct Option: 3 Best Solution (5)

17 Aug 2021 work

10 men & 15 women complete half of the work in 12 days and 6 men & 15 women complete one third of the work in 10 days. How many days are required to complete the same full work by taking 10 men and 30 women?

OPtion

1) 12
2) 16
3) 18
4) 20
5) 21
6) 24
7) 27
8) 30
9) data are insufficient
10) none of these

Solution

Assume 1 man in 1 day do x work and 1 women in 1 day do y work.
So
10x + 15y = 1/24
6x + 15y = 1/30
solving we get
x = 1/480
y = 1/720
so 10 men & 30 women in 1 day do 10/48 + 30/720 = 1/16 of work.
Whole work in 16 days.

Correct Option: 2 Best Solution (1)

16 Aug 2021 sequence

next number of the sequence 3, 6, 10, 16, 26,..... will be

OPtion

1) 28
2) 30
3) 32
4) 35
5) 36
6) 40
7) 44
8) 46
9) 48
10) none of these

Solution

2^0+2*1=3;
2^1+2*2=6;
2^2+2*3=10;
2^3+2*4=16;
2^4+2*5=26;
2^5+2*6=44;
HENCE OPTION 7)44.

Correct Option: 7 Best Solution (3)

13 Aug 2021 Profit?

A seller gets a profit of 20 % if he sells an object in 95 rupee. What will be his loss on selling it in 75
rupee.

OPtion

(1) 7.58 %
(2) 6.18 %
(3) 3.78 %
(4) 4.56 %
(5) 5.26 %
(6) 21.23 %
(7) 15.46 %
(8) 18.22 %
(9) 12.34 %
(10) None of the above

Solution

profit%=profit*100/c.p
20= ((95-c.p)*100)/c.p
c.p=79.167 rupees
loss =c.p-s.p=4.167
loss%= (4.197*100)/79.167 =5.26%
hence answer is option(5)5.26%

Correct Option: 5 Best Solution (0)

12 Aug 2021 Age in Decimal

The age of a man is thirty five years and seven and half a month. What is its age in decimal representation?

OPtion

1) 35.72
2) 35.75
3) 35.5
4) 35.71
5) 35.712
6) 35.625
7) 35.705
8) 35.075
9) 35.621
10) None of the above

Solution

seven and half a month= 15/2 months = 15/24 years
= 0.625 years

so age is 35.625 years

Correct Option: 6 Best Solution (3)

11 Aug 2021 Next Date

Write the next date of the following sequence
23/11/17
02/03/18
09/06/18
16/09/18

OPtion

1) 28/11/18
2) 26/11/18
3) 25/10/18
4) 24/12/18
5) 28/11/18
6) 29/12/18
7) 27/01/18
8) 27/12/18
9) 28/02/18
10) None of the above

Solution

all the dates, there is a difference of 99 days

Correct Option: 4 Best Solution (3)

10 Aug 2021 Number of sheets

A sheet has dimensions 70 cm.* 40cm.* 2mm. How many such sheets take a total volume of 0.4732 m^3.

OPtion

1) 895
2) 985
3) 995
4) 975
5) 965
6) 885
7) 875
8) 865
9) 845
10) None of the above

Solution

Volume of one sheet = length* width* thickness
= 70 cm.* 40 cm.* 0.2 cm.
= 560 cm^3
Total volume = 0.4732 m^3
No. of sheets = 0.4732 m^3/ 0.000480 m^3
= 845

Correct Option: 9 Best Solution (0)

09 Aug 2021 share

A share is purchased at a rate of 23.60 and sold at a rate of 36.40. If brokerage at the time of buy and sell is 50 paisa per 100 rupee, then net profit will be. (excluding any other government charges)

OPtion

1) 12.80
2) 12.30
3) 12.40
4) 12.90
5) 12.50
6) 11.90
7) 11.50
8) 11.80
9) 12.60
10) none of these

Solution

for23.60 rs brokerage=11.8paisa
and 36.40 rs brokerage=18.2paisa
so total brokerage=30paisa
total profit=12.80
net profit=total profit-total brokerage
12.50=12.80-12.30
so ans is 12.50

Correct Option: 5 Best Solution (2)

06 Aug 2021 Total nos. of rows

240 students of a school are arranged in rows. If 4 students would be less in a row then 3 more rows will be arranged. Initially total no of rows will be.

OPtion

1) 6
2) 8
3) 10
4) 12
5) 15
6) 16
7) 18
8) 20
9) 24
10) None of the above

Solution

let number of rows=x;
then no of student in each row=240/x;
according to question----
x+3=240/((240/x)-4)
x=12
so initially no of rows=12

Correct Option: 4 Best Solution (0)

05 Aug 2021 Find Value of x

60% of 90 + 90% of 60 = 3% of x^2
Find the value of x

OPtion

1) 50
2) 60
3) 61
4) 69
5) 70
6) 55
7) 65
8) 29
9) 80
10) None of the above

Solution

60% of 90 is 54.
90% of 60 is 54.
So, 60% of 90 + 90% of 60 = 54 + 54 = 108 = 3% of x^2.
It means 1% of x^2 is (108/3) = 36.
So, 100% of x^2 is (36*100) = 3600.
Hence, x = square root of 3600
=> x = 60
So, correct option is 2) 60.

Correct Option: 2 Best Solution (3)