M4maths Previous Puzzles

09 Jun 2021 Earning

Abhay, Bhaskar and Chetan earns ₹ 400 per day, while Abhay and Chetan together earn ₹ 190 and Bhaskar and Chetan together earns ₹ 262. Find out the daily earning of Chetan.

OPtion

1) 48
2) 56
3) 58
4) 52
5) 60
6) 44
7) 46
8) 45
9) 50
10) None of the above

Solution

Bhaskar’s daily earning = (400 – 190) = ₹ 210
Abhay’s daily earning = (400 – 262) = ₹ 138
Chetan’s daily earning
= [400 – (210+138)] = ₹ 52

Correct Option: 4 Best Solution (3)

08 Jun 2021 AVERAGE

A library has an average of 510 visitors on Sunday and 240 on other day. What is the average number of visitors per day in a month of 30 days whose beginning with a Monday?

OPtion

1) 285
2) 287
3) 285.3
4) 280
5) 275
6) 274
7) 278
8) 276
9) 266
10) None of the above

Solution

Since the month begins with a Monday so there will be only 4 Sundays in the month.
Hence required average
{(510 x 4 + 240 x 26)/30} = (2040 + 6240)/30
= 8280/30 = 276

Correct Option: 8 Best Solution (3)

07 Jun 2021 Age

6 years ago, the average of Pawan and Ravi was 30. The average age Pawan, Ravi and Ranjan is 30. Age of Ranjan after 6 years will be.

OPtion

1) 15
2) 20
3) 40
4) 30
5) 22
6) 23
7) 24
8) 28
9) 26
10) None of the above

Solution

Sum of present age of Pawan and Ravi = 2x30 + 2x6 = 72
As average of Pawan, Ravi and Ranjan is 30 today.
so total age of Pawan, Ravi and Ranjan = 3x30 = 90
So, Ranjan’s age as today = 90 – 72 = 18
Hence age of Ranjan’s after 6 year will be = 18 + 6
= 24 years

Correct Option: 7 Best Solution (3)

04 Jun 2021 Work & Time

Jagmohan, Vijay and Shubham can do a work separately in 12, 24, 24 days. When they work together, total days required to complete the work is?

OPtion

1) 14
2) 6
3) 8
4) 9
5) 10
6) 12
7) 5
8) 4
9) 3
10) None of the above

Solution

One day work of the 3 persons together = (1/12) + (1/24) + (1/24) = 1/6
Hence total days required are 6

Correct Option: 2 Best Solution (3)

03 Jun 2021 AVERAGE

The sum of ages of Jagmohan, Vijay and Shubham is 78 year. What will be their average age after 6 year.

OPtion

1) 78
2) 21
3) 26
4) 45
5) 68
6) 22
7) 32
8) 27
9) 65
10) None of the above

Solution

The sum of ages of Jagmohan, Vijay and Shubham is 78 year.
The sum of ages of Jagmohan, Vijay and Shubham after 6 years will be
78 +3*6= 78+18=96 years.
Their average age will be 96/3=32 years.

Correct Option: 7 Best Solution (3)

02 Jun 2021 Number

If the product of two number is 32 and sum of square of the number is 80.Then what will be the sum of the number?

OPtion

1) 16
2) 24
3) 12
4) 14
5) 23
6) 18
7) 20
8) 19
9) 22
10) None of the above

Solution

given that A*B=32

and A^2+B^2 = 80

(A+B)^2 = A^2+B^2+2AB = 80+64 = 144
A+B = 12

Correct Option: 3 Best Solution (3)

01 Jun 2021 Age

Date of birth of Kaku and Bhoomi are 05/12/2009 and 04/05/2010 respectively. How many days, the age of Kaku greater than Bhoomi.

OPtion

1) 156
2) 146
3) 154
4) 153
5) 147
6) 145
7) 155
8) 150
9) 144
10) None of the above

Solution

Total days from 05/12/2009 to 04/05/2010 are

26+31+28+31+30+4 = 150

Correct Option: 8 Best Solution (3)

31 May 2021 Number

The sum of a number, its fifth part and fifth part of its fifth part is 310. Number is?

OPtion

1) 290
2) 270
3) 235
4) 185
5) 125
6) 230
7) 340
8) 540
9) 250
10) None of the above

Solution

Let the number be x.
Therefore,
x + x/5 + x/25 = 310
or, 31x/25 = 310
or, x = 250.
Therefore the answer is 250.

Correct Option: 9 Best Solution (2)

28 May 2021 Area

A sheet has dimensions 80 cm.* 60 cm.* 1 mm. How many such sheets take a total volume of 0.4632 m3.

OPtion

1) 895
2) 985
3) 995
4) 975
5) 965
6) 885
7) 875
8) 865
9) 855
10) None of the above

Solution

Volume of one sheet = length* width* thickness
= 80 cm.* 60 cm.* 0.1 cm.
= 480 cm.3
Total volume = 0.4632 m3
No. of sheets = 0.4632 m3/ 0.000480 m3
=965

Correct Option: 5 Best Solution (0)

27 May 2021 Purchasing

According to a scheme a shopkeeper gives 50%, 40%, 30% in 3 purchasing. these purchasing cost 1500, 2700, 3500. minimum total bill would be?

OPtion

1) 3280
2) 3200
3) 3350
4) 4420
5) 4846
6) 4400
7) 2250
8) 2430
9) 5800
10) None of the above

Solution

Max discount are
3500 50% = 1750
2700 40% = 1080
1500 30% = 450
So the total bill amount is = 7700 - 3280 = 4420

Correct Option: 4 Best Solution (0)