M4maths Previous Puzzles

23 Mar 2016 Age problem

Mahesh is as much younger to Bhuwan as he is older to Chandan. If the sum of the ages of Bhuwan and Chandan is 48 years, what is the present age of Mahesh?

OPtion

1) 20 years
2) 22 years
3) 24 years
4) 26 years
5) 28 years
6) 30 years
7) 32 years
8) 34 years
9) 36 years
10)38 years

Solution

Bhuwan - Mahesh = Mahesh - Chandan
Solve
2 (M) = B + C
2M = 48
M = 24
Mahesh age = 24 years

Correct Option: 3 Best Solution (34)

22 Mar 2016 Percentage

If Rs.516 are divided among Suresh, Mohan, Shyam so that Suresh receives 25% more than Mohan and Mohan receives 25% less than Shyam, then Shyam's shares is

OPtion

1) Rs.144
2) Rs.180
3) Rs.186
4) Rs.172
5) Rs.168
6) Rs.154
7) Rs.196
8) Rs.232
9) Rs.192
10)Rs.204

Solution

Suppose Shyam gets Rs.100 then Mohan gets Rs.75
Suresh gets = 12% of Rs.175) = 375/4
Suresh:Mohan:Shyam = 375/4 : 75 : 100
=375 : 300 : 400
= 15:12:16
Therefore Shyam share = 516*16/43 = Rs. 192 (solve)
Option 9)

Correct Option: 9 Best Solution (37)

21 Mar 2016 Sequence

What is the next number of the following sequence.
1342, 1365, 1416, 1430, .......

OPtion

1) 1442
2) 1448
3) 1458
4) 1446
5) 1434
6) 1438
7) 1462
8) 1456
9) 1454
10)1472

Solution

1342
1342+(1*3)+(3*4)+(4*2) = 1342+3+12+8 = 1365
1365+(1*3)+(3*6)+(6*5) = 1365+3+18+30 = 1416
1416+(1*4)+(4*1)+(1*6) = 1416+4+4+6 = 1430
Similarly
1430+(1*4)+(4*3)+(3*0) = 1430+4+12+0 = 1446

Option 4)

Correct Option: 4 Best Solution (4)

18 Mar 2016 Profit

A shopkeeper buys a Printer set listed at Rs.10000 and get 10% and 20% successive discount. He spends 10% of his C.P. on transport. At what price (in rupees) should he sell the Printer set to earn a profit of 10%.

OPtion

1) 8692
2) 7920
3) 8922
4) 8722
5) 8970
6) 8860
7) 8740
8) 8712
9) 7822
10)7562

Solution

Net price after two discount
= 80% of 90% of Rs. 10000 = Rs.7200
Net C.P. = (7200 + 10% of Rs. 7200) = 7920
Therefore
S.P. = 110% of Rs. 7920 = Rs.8712

Option 7)

Correct Option: 8 Best Solution (21)

17 Mar 2016 Three digit number

Sum of all the 3 digit number formed by using digits 3, 4, 6 & 8 will be no digit is repeated in any number.

OPtion

1) 14112
2) 15246
3) 13860
4) 12466
5) 13986
6) 13796
7) 12726
8) 14238
9) 12978
10)13482

Solution

Total combination are
3,4,6 and 3,4,8 and 3,6,8 and 4,6,8
in every pair 6 number are possible so total sum in very place
= 2[(3+4+6)+(3+4+8)+(3+6+8)+(4+6+8)]
= 2(13+15+17+18)
2(63) = 126
Net sum
12600+1260+126
13986
Option 5)

Correct Option: 5 Best Solution (3)

16 Mar 2016 Ratio

Ashok, Sohan and Deepak start a shop with their investment ratio of 6:7:8. Ashok withdraws his investment after 2 month. If profit is distributed between them yearly, then ratio of profit of Deepak and profit of Ashok in the business is

OPtion

1) 8:7
2) 8:1
3) 7:1
4) 1:7
5) 1:8
6) 7:8
7) 3:4
8) 4:3
9) 1:6
10)6:1

Solution

The effective proportion of Deepak = 8 × 12 (month) = 96
And the effective proportion of Ashok = 6 × 2 (month) = 12
Hence ratio is 96 : 12 = 8 : 1

Option 2)

Correct Option: 2 Best Solution (22)

15 Mar 2016 Coded language

If
7351 = 5
439 = 8
12456 = 0
Then
2462 = ?

OPtion

1) 0
2) 1
3) 2
4) 3
5) 4
6) 5
7) 6
8) 7
9) 8
10)9

Solution

7351 = 7*3*5*1 = 105 = 5 (only unit place is taken), similarly for others
2*4*6*2 = 96
6
Option 7)

Correct Option: 7 Best Solution (42)

14 Mar 2016 Sequence

What is the missing number of the following sequence
13, 39, 351, 35, ......., 85, 425, 210

OPtion

1) 275
2) 245
3) 285
4) 325
5) 75
6) 85
7) 185
8) 115
9) 175
10)15

Solution

13
13*3 = 39 (First two digit multiply with last digit)
39*9 = 351
35*1 = 35
35*5 = (175) Answer Option 9)
17*5 = 85
85*5 = 425
42*5 = 210
21*0 = 0 (last number)

Correct Option: 9 Best Solution (30)

11 Mar 2016 Time and work

Abdul is thrice as good a workman as Rehman and takes 10 days less to do a piece of work than Rehman takes. The number of days taken by Rehman to firish the work is

OPtion

1) 12
2) 13
3) 14
4) 15
5) 16
6) 18
7) 19
8) 20
9) 26
10)30

Solution

Ratio of the time taken by Abdul and Rehman = 1:3
If diff. of time is 2 days, Rehman takes 3 days
If diff of time is 10 days, Rehman taken 3/2 * 10 = 15 days

Option 4)

Correct Option: 4 Best Solution (36)

10 Mar 2016 Coded language

If in coded language
1.67 * 2.31 = 129
2.39 * 4.31 = 202
6.78 * 4.87 = 816
Then
7.16 * 9.13 = ?

OPtion

1) 506
2) 16.29
3) 229
4) 464
5) 228
6) 426
7) 217
8) 2136
9) 45
10) 276

Solution

1.67 * 2.31 = 1× 67 + 2× 31= 129

2.39 * 4.31 = 2× 39 + 4× 31= 202

Similarly for others.

Correct Option: 3 Best Solution (10)