Mathematical and Logical Reasoning Test 20

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Mathematical and Logical Reasoning Test 20

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Weekly Quiz Competition

Question 1
1 / -0

Find the odd one among the following:

A
$$1011$$

B
$$1101$$

C
$$1111$$

D
$$10001$$

Solution

The given numbers are in binary system, converting these into the decimal system we get, 1011
$$\Rightarrow 1\times 2^3+0\times 2^2+1\times 2^1+1\times 2^0$$
$$=8+2+1=11$$
$$1101\Rightarrow 1\times 2^3+1\times 2^2+0\times 2^1+1\times 2^0$$
$$=8+4+1=13$$
$$1111\Rightarrow 1\times 2^3+1\times 2^2+1\times 2^1+1\times 2^0$$
$$=8+4+2+1=15$$
$$0001\Rightarrow 1\times 2^4+0\times 2^3+0\times 2^2+0\times 2^1+1\times 2^0$$
$$=16+1=17$$
$$111=1\times 2^2+1\times 2^1+1\times 2^6$$
$$=4+2+1=7$$
All the given numbers except 15 are prime numbers.
Question 2
1 / -0

Find the odd one among the following:

A
$$17$$

B
$$27$$

C
$$37$$

D
$$47$$

Solution

All the given numbers except 27 are prime numbers whereas 27 is a composite number.
Question 3
1 / -0

Choose the odd-one out :

A
1472

B
3848

C
2683

D
4210

Solution

in all other terms digit 4 is used
Question 4
1 / -0

Pointing to a man on the stage Rita says "He is the brother of the daughter of the wife of my husband" How is the man on the stage related to Rita?

A
Son

B
Husband

C
Cousin

D
Nephew

E
Brother in law

Solution

Wife of the husband means herself; Brother of her daughter means her son.
Question 5
1 / -0

Choose the odd-one out :

A
48-134

B
40-110

C
18-48

D
30-80

Solution

in rest $$\displaystyle 2^{nd}$$ number =($$\displaystyle 1^{st}$$ number $$\displaystyle \times $$ 3 ) -10
Question 6
1 / -0

Choose the odd-one out :

A
7654

B
4567

C
9876

D
4321

Solution

in other group number is in descending order
Question 7
1 / -0

Find the odd one among the following:

A
$$441$$

B
$$289$$

C
$$361$$

D
$$343$$

Solution

The given numbers can be written as $$(21)^2, (17)^2, (19)^2, (7)^3, (25)^2$$ All except 343 are the squares whereas 343 is a cube.
Question 8
1 / -0

Find a wrong number in a series:
7, 28, 63, 124, 215, 342, 511.

A
7

B
28

C
124

D
215

E
342

Solution

Clearly the correct sequence is :
$$\displaystyle { 2 }^{ 3 }-1,{ 3 }^{ 3 }-1,{ 4 }^{ 3 }-1,{ 5 }^{ 3 }-1,{ 6 }^{ 3 }-1,{ 7 }^{ 3 }-1,{ 8 }^{ 3 }-1.\\ \therefore 28\quad is\quad wrong\quad and\quad should\quad be\quad replaced\quad with\quad { 3 }^{ 3 }-1 i.e.\quad 26$$.
Hence, the answer is (b).
Question 9
1 / -0

If P is brother of Q, R is father of P, S is brother of T, T is daughter of Q, then uncle of S is _______.

A
P

B
Q

C
R

D
S

E
None of these

Solution

P and Q are brothers (Remember that children of Q will have P as their uncle) S and T are brother and sister and both are children of Q Thus uncle of S is P.
Question 10
1 / -0

3

A
adcl

B
rp N

C
igmO

D
ro p Z

E
itSK

Solution

Rest all are having 4 letters

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Mathematical and Logical Reasoning Test 20

Result

Mathematical and Logical Reasoning Test 20

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SHARING IS CARING

Question 1

$$1011$$

$$1101$$

$$1111$$

$$10001$$

Solution

Question 2

$$17$$

$$27$$

$$37$$

$$47$$

Solution

Question 3

1472

3848

2683

4210

Solution

Question 4

Son

Husband

Cousin

Nephew

Brother in law

Solution

Question 5

48-134

40-110

18-48

30-80

Solution

Question 6

7654

4567

9876

4321

Solution

Question 7

$$441$$

$$289$$

$$361$$

$$343$$

Solution

Question 8

7

28

124

215

342

Solution

Question 9

P

Q

R

S

None of these

Solution

Question 10

adcl

rp N

igmO

ro p Z

itSK

Solution

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Question Analysis

My Perfomance

Score

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Rank

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