Numbers - Arithmetic Aptitude Questions and Answers

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(112 x 5⁴) = ?

A.

67000

B.

70000

C.

76500

D.

77200

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Answer : Option B

Explanation :

112 x5⁴ =112 x $(\frac{10}{2})^4$ = $(\frac{112X10^4}{2^4})$ = $(\frac{1120000}{16})$ =70000

It is being given that (2³² + 1) is completely divisible by a whole number. Which of the following numbers is completely divisible by this number?

A.

(2¹⁶ + 1)

B.

(2¹⁶ - 1)

C.

(7 x 2²³)

D.

(2⁹⁶ + 1)

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What least number must be added to 1056, so that the sum is completely divisible by 23 ?

A.

2

B.

3

C.

18

D.

21

E.

None of these

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1397 x 1397 = ?

A.

1951609

B.

1981709

C.

18362619

D.

2031719

E.

None of these

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How many of the following numbers are divisible by 132 ?
264, 396, 462, 792, 968, 2178, 5184, 6336

A.

4

B.

5

C.

6

D.

7

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(935421 x 625) = ?

A.

575648125

B.

584638125

C.

584649125

D.

585628125

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Answer : Option B

Explanation :

935421 *625=935421*5^{4 =935421* $( {10\over2})^4$}

^{$={935421 \times10^4\over 2^4}$}

= 584638125

The largest 4 digit number exactly divisible by 88 is:

A.

9944

B.

9768

C.

9988

D.

8888

E.

None of these

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Which of the following is a prime number ?

A.

33

B.

81

C.

93

D.

97

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What is the unit digit in {(6374)¹⁷⁹³ x (625)³¹⁷ x (341⁴⁹¹)}?

A.

0

B.

2

C.

3

D.

5