Posted On:February 27, 2019, Posted By: Latest Interview Questions,
Views: 257, Rating :

Dear Readers, Welcome to __ Number Series Objective Questions__ have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of

A.7 only

B.11 only

C.13 only

D.All 7, 11 and 13

Ans: D

**Explanation:**

Clearly, 325325 is divisible by all 7, 11 and 13

A.3

B.6

C.7

D.8

Ans: D

**Explanation:**

Let the two consecutive odd integers be (2x + 1) and (2x + 3)

Then, (2x + 3)2 - (2x + 1)2 = (2x + 3 + 2x + 1) (2x + 3 - 2x - 1) = (4 x + 4) x 2

= 8 (x + 1), which is always divisible by 8

A. 14

B. 18

C. 20

D. 28

Ans: D

**Explanation:**

Let the ten’s digits be x. Then, unit’s digit = 4x.

x + 4x = 10

5x = 10

x = 2.

So, ten’s digit = 2, unit’s digit = 8.

Hence, the required number is 28.

A. 9

B. 11

C. 13

D. 15

Ans: D

**Explanation:**

Let the three integers be x, x + 2 and x + 4.

Then, 3x = 2(x + 4) + 3

x = 11.

Third integer = x + 4 = 15.

A. 3

B. 4

C. 9

D. Cannot be determined

E. None of these

Ans: B

**Explanation:**

Let the ten's digit be x and unit's digit be y.

Then, (10x + y) - (10y + x) = 36

9(x - y) = 36

x - y = 4.

A. 69

B. 78

C. 96

D. Cannot be determined

E. None of these

Ans: D

**Explanation:**

Let the ten's digit be x and unit's digit be y.

Then, x + y = 15 and x - y = 3 or y - x = 3.

Solving x + y = 15 and x - y = 3, we get: x = 9, y = 6.

Solving x + y = 15 and y - x = 3, we get: x = 6, y = 9.

So, the number is either 96 or 69.

Hence, the number cannot be determined.

A. 3

B. 5

C. 9

D. 11

Ans: D

**Explanation:**

Let the ten's digit be x and unit's digit be y.

Then, number = 10x + y.

Number obtained by interchanging the digits = 10y + x.

(10x + y) + (10y + x) = 11(x + y), which is divisible by 11.

A. 24

B. 26

C. 42

D. 46

Ans: A

**Explanation:**

Let the ten's digit be x.

Then, unit's digit = x + 2.

Number = 10x + (x + 2) = 11x + 2.

Sum of digits = x + (x + 2) = 2x + 2.

(11x + 2)(2x + 2) = 144

22x2 + 26x - 140 = 0

11x2 + 13x - 70 = 0

(x - 2)(11x + 35) = 0

x = 2.

Hence, required number = 11x + 2 = 24.

A. 3

B. 10

C. 17

D. 20

Ans: A

**Explanation:**

Let the number be x.

Then, x + 17 = 60/6

x2 + 17x - 60 = 0

(x + 20)(x - 3) = 0

x = 3.

A. 145

B. 253

C. 370

D. 352

Ans:B

Explanation:

Numbers Important Formulas Questions |

Problems on Numbers Example Problems Aptitude Questions |

Number Series - Aptitude Questions and Answers |