Numbers Test 21

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Numbers Test 21

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Question 1/30
1 / -0

Directions For Questions

6

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When you reverse the digit of the number 13, the number increase by 18 . how many other two digit number increase by 18 when their digits are reversed?

Correct

Wrong

Skipped
A
5

Correct

Wrong

Skipped
B
6

Correct

Wrong

Skipped
C
7

Correct

Wrong

Skipped
D
8

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Solutions
6
Question 2/30
1 / -0

Directions For Questions

168=2*2*2*3*7

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In which of the following expressions, prime factorisation has been done ?

Correct

Wrong

Skipped
A
12=3*4

Correct

Wrong

Skipped
B
168=2*2*2*3*7

Correct

Wrong

Skipped
C
150=2*3*25

Correct

Wrong

Skipped
D
324=2*2*3*27

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Solutions
168=2*2*2*3*7
Question 3/30
1 / -0

Directions For Questions

555681

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A boy multiplied 987 by a certain number and obtained 559981 as his answer. If in the answer both 9 are wrong and the other digits are correct, then the correct answer would be ?

Correct

Wrong

Skipped
A
556581

Correct

Wrong

Skipped
B
555681

Correct

Wrong

Skipped
C
555181

Correct

Wrong

Skipped
D
553681

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Solutions
555681
Question 4/30
1 / -0

Directions For Questions

2079

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Which of the following numbers is divisible by 3, 7, 9 and 11?

Correct

Wrong

Skipped
A
2079

Correct

Wrong

Skipped
B
47321

Correct

Wrong

Skipped
C
87623

Correct

Wrong

Skipped
D
21534

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Solutions
2079
Question 5/30
1 / -0

Directions For Questions

2*2*3*3*7

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252 can be exressed as a product of primes as ?

Correct

Wrong

Skipped
A
2*2*3*3*7

Correct

Wrong

Skipped
B
2*2*2*3*7

Correct

Wrong

Skipped
C
3*3*3*3*7

Correct

Wrong

Skipped
D
2*3*3*3*7

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Solutions
2*2*3*3*7
Question 6/30
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Directions For Questions

4

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(AA)2=DCBA, where A,B,C and D are distinct digits with B being odd. Find the value of D.

Correct

Wrong

Skipped
A
1 or 4

Correct

Wrong

Skipped
B
1

Correct

Wrong

Skipped
C
6

Correct

Wrong

Skipped
D
4

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Solutions
4
Question 7/30
1 / -0

Directions For Questions

40

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Three number are in the ratio of 3 : 4 : 5 and their L.C.M. is 2400. Their H.C.F. is:

Correct

Wrong

Skipped
A
20

Correct

Wrong

Skipped
B
23

Correct

Wrong

Skipped
C
40

Correct

Wrong

Skipped
D
50

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Solutions
40
Question 8/30
1 / -0

Directions For Questions

7

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What is the unit digit in 7^105?

Correct

Wrong

Skipped
A
1

Correct

Wrong

Skipped
B
5

Correct

Wrong

Skipped
C
7

Correct

Wrong

Skipped
D
9

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Solutions
7
Question 9/30
1 / -0

Directions For Questions

192

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Let n be the number of different 5 digit numbers, divisible by 4 with the digits 1, 2, 3, 4, 5 and 6, no digit being repeated in the numbers. What is the value of n?

Correct

Wrong

Skipped
A
144

Correct

Wrong

Skipped
B
192

Correct

Wrong

Skipped
C
168

Correct

Wrong

Skipped
D
None of these

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Solutions
192
Question 10/30
1 / -0

Directions For Questions

145

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21, 25, 33, 49, 81,.

Correct

Wrong

Skipped
A
145

Correct

Wrong

Skipped
B
146

Correct

Wrong

Skipped
C
167

Correct

Wrong

Skipped
D
188

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Solutions
145
Question 11/30
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Directions For Questions

an odd number

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The cube root of an odd number is always an ?

Correct

Wrong

Skipped
A
an even number

Correct

Wrong

Skipped
B
a prime number

Correct

Wrong

Skipped
C
an odd number

Correct

Wrong

Skipped
D
sometimes even and sometimes odd number.

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Solutions
an odd number
Question 12/30
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Directions For Questions

586413

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587×999 = ?

Correct

Wrong

Skipped
A
615173

Correct

Wrong

Skipped
B
587523

Correct

Wrong

Skipped
C
586413

Correct

Wrong

Skipped
D
none

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Solutions
586413
Question 13/30
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Directions For Questions

8/-14

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Express -4/7 as a rational number with numerator 8 ?

Correct

Wrong

Skipped
A
3/14

Correct

Wrong

Skipped
B
8/-14

Correct

Wrong

Skipped
C
14/8

Correct

Wrong

Skipped
D
34/4

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Solutions
8/-14
Question 14/30
1 / -0

Directions For Questions

0

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(-48)*(-1)*(3)*0*(-4)= ?

Correct

Wrong

Skipped
A
-576

Correct

Wrong

Skipped
B
576

Correct

Wrong

Skipped
C
0

Correct

Wrong

Skipped
D
1000
Question 15/30
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Directions For Questions

56094

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(35423 7164 41720) - (317 x 89) = ?

Correct

Wrong

Skipped
A
56094

Correct

Wrong

Skipped
B
50694

Correct

Wrong

Skipped
C
84307

Correct

Wrong

Skipped
D
28213

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Solutions
56094
Question 16/30
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Directions For Questions

3

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If the number 91876 * 2 is completely divisible by 8, then the smallest whole number in place of * will be?

Correct

Wrong

Skipped
A
4

Correct

Wrong

Skipped
B
3

Correct

Wrong

Skipped
C
2

Correct

Wrong

Skipped
D
1

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Solutions
3
Question 17/30
1 / -0

Directions For Questions

8

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What is the digit of the number 2^51 expressed in its decimal form ?

Correct

Wrong

Skipped
A
2

Correct

Wrong

Skipped
B
4

Correct

Wrong

Skipped
C
6

Correct

Wrong

Skipped
D
8

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Solutions
8
Question 18/30
1 / -0

Directions For Questions

729

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186 x 186 159 x 159 - 2 x 186 x 159 = ?

Correct

Wrong

Skipped
A
722

Correct

Wrong

Skipped
B
729

Correct

Wrong

Skipped
C
8723

Correct

Wrong

Skipped
D
12776

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Solutions
729
Question 19/30
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Directions For Questions

35

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A number is divisible by both 5 and 7. By which other number will that number be always divisible ?

Correct

Wrong

Skipped
A
67

Correct

Wrong

Skipped
B
35

Correct

Wrong

Skipped
C
23

Correct

Wrong

Skipped
D
56

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Solutions
35
Question 20/30
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Directions For Questions

94 sec

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The three words "TATA Assets Rock" are flashed such that the words individually are switched on at regular intervals of 4,7 and 9 seconds respectively and after they are switched on, the words are switched off after 2 sec, 4 sec and 5 sec respectively. If at time 't' all the words happened to switch off simultaneously, find the least time 't' which all three words will switch on simultaneously.

Correct

Wrong

Skipped
A
38 sec

Correct

Wrong

Skipped
B
94 sec

Correct

Wrong

Skipped
C
126 sec

Correct

Wrong

Skipped
D
252 sec

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Solutions
94 sec
Question 21/30
1 / -0

Directions For Questions

4

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What is the last digit of the number 3579 1?

Correct

Wrong

Skipped
A
3

Correct

Wrong

Skipped
B
7

Correct

Wrong

Skipped
C
4

Correct

Wrong

Skipped
D
1

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Solutions
4
Question 22/30
1 / -0

Directions For Questions

144

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81 ,9,64 ,8,.....,12

Correct

Wrong

Skipped
A
97

Correct

Wrong

Skipped
B
100

Correct

Wrong

Skipped
C
96

Correct

Wrong

Skipped
D
144

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Solutions
144
Question 23/30
1 / -0

Directions For Questions

125

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How many 3-digit numbers do not have an even digit or a zero?

Correct

Wrong

Skipped
A
150

Correct

Wrong

Skipped
B
125

Correct

Wrong

Skipped
C
80

Correct

Wrong

Skipped
D
60

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Solutions
125
Question 24/30
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Directions For Questions

n is any natural number

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(x

Correct

Wrong

Skipped
A
n is prime

Correct

Wrong

Skipped
B
n is and odd natural number

Correct

Wrong

Skipped
C
n is an even natural number

Correct

Wrong

Skipped
D
n is any natural number

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Solutions
n is any natural number
Question 25/30
1 / -0

Directions For Questions

4

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What is the unit digit in the product (3^65*6^59*7^71)?

Correct

Wrong

Skipped
A
1

Correct

Wrong

Skipped
B
2

Correct

Wrong

Skipped
C
4

Correct

Wrong

Skipped
D
6

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Solutions
4
Question 26/30
1 / -0

Directions For Questions

1

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Let A denote the set of positive integers each of which when divided by 2,3,4,5,6 leaves a remainder of 1,2,3,4,5 respectively.how many numbers in A are between 0 and 100 ?

Correct

Wrong

Skipped
A
0

Correct

Wrong

Skipped
B
1

Correct

Wrong

Skipped
C
2

Correct

Wrong

Skipped
D
None of these

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Solutions
1
Question 27/30
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Directions For Questions

-2

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The value of the expression (-10-10)/{-10-(-10-10)} is ?

Correct

Wrong

Skipped
A
10

Correct

Wrong

Skipped
B
-10

Correct

Wrong

Skipped
C
0

Correct

Wrong

Skipped
D
-2

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Solutions
-2
Question 28/30
1 / -0

Directions For Questions

117

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Product of two-prime numbers is 117.Their L.C.M. should be ?

Correct

Wrong

Skipped
A
1

Correct

Wrong

Skipped
B
117

Correct

Wrong

Skipped
C
equal to their H.C.F.

Correct

Wrong

Skipped
D
cannot be calculated

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Solutions
117
Question 29/30
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Directions For Questions

-5/17

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Out of the rational numbers -5/9,-5/17,-5/17, the greatest is ?

Correct

Wrong

Skipped
A
-5/9

Correct

Wrong

Skipped
B
-5/11

Correct

Wrong

Skipped
C
-5/17

Correct

Wrong

Skipped
D
None of these

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Solutions
-5/17
Question 30/30
1 / -0

Directions For Questions

14

...view full instructions

2, 5, 9, ..... , 20 , 27

Correct

Wrong

Skipped
A
16

Correct

Wrong

Skipped
B
12

Correct

Wrong

Skipped
C
13

Correct

Wrong

Skipped
D
14

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Solutions
14

Question 1/30

5

6

7

8

Question 2/30

12=3*4

168=2*2*2*3*7

150=2*3*25

324=2*2*3*27

Question 3/30

556581

555681

555181

553681

Question 4/30

2079

47321

87623

21534

Question 5/30

2*2*3*3*7

2*2*2*3*7

3*3*3*3*7

2*3*3*3*7

Question 6/30

1 or 4

1

6

4

Question 7/30

20

23

40

50

Question 8/30

1

5

7

9

Question 9/30

144

192

168

None of these

Question 10/30

145

146

167

188

Question 11/30

an even number

a prime number

an odd number

sometimes even and sometimes odd number.

Question 12/30

615173

587523

586413

none

Question 13/30

3/14

8/-14

14/8

34/4

Question 14/30

-576

576

0

1000

Question 15/30

56094

50694

84307

28213

Question 16/30

4

3

2

1

168=22237

150=2325

324=223*27

22337

22237

33337

23337