Question 1

If the HCF and LCM of two numbers is respectively 23 and 805. If one of the numbers is 115, then find the other number?

A

172

B

161

C

193

D

207

Question 2

Find the remainder when 9²³¹ is divided by 4?

A

3

B

1

C

2

D

0

Question 3

What is the least number that must be added to 1353 so that the number is exactly divisible by 21?

A

12

B

9

C

8

D

13

Question 4

Find the value of 5 ÷ 5 – [6 + {4 – 7 + (2 + 4 – 5) + 9} – 12]?

A

1

B

0

C

D

2

Question 5

Find the smallest 5 digit number that is exactly divisible by 372?

A

10052

B

10044

C

10328

D

10051

Question 6

Find the unit digit of 216 × 611 × 5116 × 613 × 627?

A

5

B

6

C

3

D

4

Question 7

Find the value of

A

B

C

D

Question 8

The sum of digits of a two digit number is given as 13. If the digits of the number are reversed, then the number is decreased by 45. Find the product of the digits of number?

A

40

B

36

C

42

D

30

Question 9

Find the number of perfect cubes that lie between 1 and 300?

A

6

B

7

C

5

D

4

Question 10

Find the HCF of 1680 and 1260?

A

5040

B

560

C

350

D

420

Question 11

Find the LCM of

A

B

C

D

13.88

Question 12

A

B

C

D

Question 13

Find the product of 0.4 × 0.04 × 0.004 × 0.0004 × 0.00004?

A

1.024 × 10^{– 5}

B

1.024 × 10^{– 12}

C

1.024 × 10^{– 8}

D

1.024 × 10^{– 15}

Question 14

When the 15325 is divided by certain number it leaves 122 as quotient and 75 as remainder. Find the divisor?

A

115

B

235

C

225

D

125

Question 15

Simplify the expression

A

B

C

D

Number System-1 RRB NTPC 25-4-20

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