M4maths Previous Puzzles

06 Aug 2009 Water code

Codes for some liquids are given below
Liquid Code
Oil 15
Milk 13
Petrol 16
Code for Water will be

OPtion

1) 15
2 14
3) 12
4) 10
5) 17
6) 11
7) 18
8) 19
9) 13
10) 23

Solution

Codes are offered on the basis of positions of first alphabet used in the name of liquid.

Correct Option: 10 Best Solution (0)

05 Aug 2009 Code for FORESTRY

Following subjects and their codes are given below:
PHYSICS : 322
CHEMISTRY : 504
MATHS : 302
GEOGRAPHY : 324
Code for FORESTRY is

OPtion

1) 206
2) 522
3) 422
4) 341
5) 431
6) 503
7) 305
8) 701
9) 224
10) 404

Solution

Middle number of the code represents the number of times a letter comes in the name of subject.
First number of the code is the number of letters used (excluding revised letter) in the name
of subject from first 13 alphabets similarly last number of the code is the number of letters
used (excluding revised letter) in the name of subject from last 13 alphabets.

Correct Option: 9 Best Solution (0)

04 Aug 2009 Guess what Next

Next number of the following sequence is
637, 1373, 5104, 9119,��.

OPtion

1) 13134
2) 18238
3) 145789
4) 457861
5) 34527
6) 15487
7) 197456
8) 12546
9) 157686
10) 14572

Solution

First number is 637
Next number is 637+736= 1373
Next number is 1373+3731= 5104
Next number is 5104+4015= 9119 similarly for next.

Correct Option: 2 Best Solution (1)

03 Aug 2009 Code for letter 2

Some numbers and their codes are given in the table below
Number Code
1, 6, 7 J
12 D
9 S
3, 5 M
4, 8 A
What will be the code for 2

OPtion

1) W
2) B
3) F
4) Y
5) K
6) A
7) M
8) S
9) D
10) J

Solution

Codes are given according to the first letter used in the name of months of a year
1 January
2 February
3 March
4 April
5 May
6 June
7 July
8 August
9 September
10 October
11 November
12 December

Correct Option: 3 Best Solution (0)

01 Aug 2009 Science Basic Rule

If 1.67*2.191 = 3.66
4.76*3.12 = 14.8
Then 2.42*1.6 =

OPtion

1) 3
2) 3.872
3) 3.87
4) 3.88
5) 3.9
6) 3.90
7) 3.900
8) 3.8720
9) 3.870
10) 3.80

Solution

In first product 1.67 has 3 digits and 2.191 has 4 digits, therefore answer should be written up to 3 digits (minimum number of digits used)
In second product 4.76 has 3 digits and 3.12 has 3 digits too, therefore answer should be written up to 3 digits (minimum number of digits used)
In last product 1.6 has 2 digits only hence 3.9 (rounded off) is the answer.

Correct Option: 5 Best Solution (0)

31 Jul 2009 circle in a plane

Maximum and minimum number of intersecting points between 5 circles drawn in a plane are

OPtion

1) 16, 0
2) 18, 2
3) 10, 4
4) 12, 4
5) 20, 0
6) 10, 0
7) 22, 0
8) 12, 2
9) 20, 1
10) 16, 1

Solution

Every circle intersects other circle in maximum 2 points or minimum 0 point.
Total number of combinations of circle are 10 hence maximum points are 20.
Minimum intersecting points are 0.

Correct Option: 5 Best Solution (0)

30 Jul 2009 probability (Level: Hard)

There are 4 men A, B, C, D and 4 women a, b, c, d.
If B's wife is not a and A's wife is not c then probability that C's wife is either b or d is

OPtion

1) 1/2
2) 4/7
3) 3/7
4) 1/4
5) 1/3
6) 1/7
7) 1/12
8) 3/4
9) 15/16
10) 3/5

Solution

Total no. of combinations are 4*3*2*1=24
There are 6 ways for making a pair of B-a, similarly 6 ways are possible for the pair A-c in these ways 2 ways are common hence total no. of rejected ways
=6+6-2=10
Similarly 6-6 ways are possible for the combination of C-b and C-d, in these ways 3-3 ways are affiliated with pair A-c and B-a hence only 3-3 ways are acceptable
A representation for the pair C-b is
C-b A-a B-c D-d (selected)
C-b A-a B-d D-c (selected
C-b A-c B-a D-d (rejected)
C-b A-c B-d D-a (rejected)
C-b A-d B-a D-c (rejected)
C-b A-d B-c D-a (selected)

Hence probability is 6/14=3/7

Correct Option: 3 Best Solution (0)

29 Jul 2009 EVERY END IS A START

Some statements and their codes are given below
LIFE IS A DEEP MYSTERY 4
GOD IS THE CREATURE 3
UNIVERSE IS UNLIMITED 4
in this coded language EVERY END IS A START is written as

OPtion

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

Solution

The alphabet E comes 4 times in statement LIFE IS A DEEP MYSTERY.
No other alphabet comes
more than E in the statement hence code is 4.In statement GOD IS THE CREATURE the alphabet
E comes 3 times and no other alphabet comes more than E in the statement hence code is 3.In statement UNIVERSE IS UNLIMITED the alphabet I comes
4 times and no other alphabet comes more than I in the statement hence code is 4.
Similarly in the statement EVERY END IS A START the alphabet E comes 3 times and no other
alphabet comes more than E in the statement hence code is 3.

Correct Option: 1 Best Solution (1)

28 Jul 2009 evaluate this

VALUE -> UKIPQ
TRUE -> BCPO
HEARTH -> CDQBL

Then "TABLET" is

OPtion

1) QPRTJ
2) JAGOR
3) BKTIQB
4) BQTIQ
5) SJFP
6) JTUK
7) ALMPRT
8) SAJGO
9) SAJGXO
10) RJAS

Solution

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
For VALUE
Difference of places of V & A / A & L / L & U / U & E / E & V are respectively
21 11 9 16 17
Alphabets in these positions are U / K / I / P / Q
Similarly for TRUE
For HEARTH :
Difference of places of H & E / E & A / A & R / R & T / T & H / H & H are respectively
3 4 17 2 12 0
Alphabets in these positions are C / D / Q / B / L / �..
No alphabet is used for position 0
Now for TABLET
Difference of places of T & A / A & B / B & L / L & E / E & T / T & T are respectively
19 1 10 7 15 0
Alphabets in these positions are S / A / J / G / O /�..

Correct Option: 8 Best Solution (0)

27 Jul 2009 calculate this

If 38562 = 113303
43151 = 7255
28393 = 105273
Then 34284 is

OPtion

1) 1281632
2) 761012
3) 1264
4) 72162
5) 122162
6) 242
7) 72104
8) 2467
9) 15127
10) 345164

Solution

38562 = 3+8 / 8-5 / 5*6 / (6/2) = 11 3 30 3
43151 = 4+3 / 3-1 / 1*5 / (5/1) = 7 2 5 5
28393 = 2+8 / 8-3 / 3*9 / (9/3) = 10 5 27 3
Similarly 34284 = 3+4 / 4-2 / 2*8 / (8/4) = 7 2 16 2

Correct Option: 4 Best Solution (1)