M4maths Previous Puzzles

26 Nov 2010 find the integer

Seven times of square of an integer is less than the number of days in September but greater than
the number of days in a week. Integer is

OPtion

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

Solution

Only 2 satisfies the condition.

Correct Option: 1 Best Solution (8)

25 Nov 2010 Find the number?

An integer is such that twice of its square is 7 less than the 9 multiple of that integer. Integer is

OPtion

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

Solution

According to the given condition
2x2 = 9x – 7
Only 1 satisfies this condition

Correct Option: 6 Best Solution (18)

24 Nov 2010 Possible solution?

a + b + c = 9,
2 < a < 6,
1 < b < 6,
2 < c < 8
Possible number of solutions is

OPtion

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

Solution

(3, 2, 4), (3, 3, 3), (4, 2, 3)

Correct Option: 5 Best Solution (5)

23 Nov 2010 Improvement exam

A boy achieves 79.4 % in intermediate board examination out of 500 marks. In improvement exam, he gets 87 in physics.
If his marks of physics in the main exam are 69, then his new % is

OPtion

1) 83
2) 82.4
3) 81.8
4) 80.6
5) 79.6
6) 84
7) 81
8) 82
9) 80
10) 82.8

Solution

Difference in physics marks = 87 – 69 = 18
% due to 18 marks = 18/5 = 3.6
Hence new % = 79.4 + 3.6 = 83

Correct Option: 1 Best Solution (8)

22 Nov 2010 Find the age difference?

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) 158

Solution

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

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

Correct Option: 8 Best Solution (0)

19 Nov 2010 Number divisible by 3 and 5

Sum of all the integers between 10 and 99, which are divisible by 3 and 5 both, is

OPtion

1) 305
2) 425
3) 380
4) 350
5) 430
6) 455
7) 315
8) 295
9) 285
10) 385

Solution

15+30+45+60+75+90 = 315

Correct Option: 7 Best Solution (3)

18 Nov 2010 What will be the new ball radius?

After melting 4 balls of iron of radius 2 cm., a larger ball is formed. Its radius is?

OPtion

1) Less than 2 cm.
2) Greater than 4 cm.
3) 4 cm.
4) 2 cm.
5) Less than 4 cm.
6) 8 cm.
7) Greater than 8 cm.
8) Greater than 4 cm. but less than 8 cm.
9) 16 cm.
10) Greater than 16 cm.

Solution

According to mensuration, on melting 23 balls of 2 cm. radius, a ball of 4 cm. radius will be formed.

Correct Option: 5 Best Solution (7)

17 Nov 2010 Sum of number?

If the product of two number is 48 and sum of square of the number is 100.Then what will be the sum of the number?

OPtion

1) 16
2) 24
3) 26
4) 14
5) 26
6) 12
7) 20
8) 19
9) 22
10) 15

Solution

give that A*B=48

and A^2+B^2 = 100

(A+B)^2 = A^2+B^2+2AB = 100+96 = 196
A+B = 14

Correct Option: 4 Best Solution (3)

16 Nov 2010 How many number are possible?

How many 2 digit numbers are possible in which each digit in a prime number but the number is not a prime number?

OPtion

1) 10
2) 12
3) 13
4) 16
5) 25
6) 20
7) 27
8) 23
9) 18
10) 30

Solution

22, 25, 27
32, 33, 35
52, 55, 57
72, 75, 77

Correct Option: 2 Best Solution (0)

15 Nov 2010 Average age?

The sum of ages of ram, shyam and ankit is 63 year.what will be their average age after 5 year.

OPtion

1) 78
2) 21
3) 26
4) 45
5) 68
6) 22
7) 28
8) 27
9) 65
10) 20

Solution

current average age is 63/3
=21
so after 5 year their age will be
21+5 = 6

Correct Option: 3 Best Solution (11)