Quantitative Aptitude for Competitive Examinations>Chapter 1 - Number System>Practice Problems Level 2>Q 60

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IMPORTANT

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How many $9$ 's are there in the $99, 99, 98, 99, 999^{2} ?$

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Important Questions on Number System

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Quantitative Aptitude for Competitive Examinations>Chapter 1 - Number System>Practice Problems Level 2>Q 61

The digit in unit's place of the product

81 \times 82 \times . . . \times 89

is:

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Quantitative Aptitude for Competitive Examinations>Chapter 1 - Number System>Practice Problems Level 2>Q 62

The digit in the unit's place of the product

(2, 464)^{1793} \times (615)^{317} \times (131)^{491}

is:

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Quantitative Aptitude for Competitive Examinations>Chapter 1 - Number System>Practice Problems Level 2>Q 63

The digit in the unit's place of the number

(1, 570)^{2} + (1, 571)^{2} + (1, 572)^{2} + (1, 573)^{2}

is:

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Quantitative Aptitude for Competitive Examinations>Chapter 1 - Number System>Practice Problems Level 2>Q 64

The unit digit in

3 \times 38 \times 537 \times 1, 256

is:

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Quantitative Aptitude for Competitive Examinations>Chapter 1 - Number System>Practice Problems Level 2>Q 65

How many digits in all are required to write numbers from

1

to

50 ?

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Quantitative Aptitude for Competitive Examinations>Chapter 1 - Number System>Practice Problems Level 2>Q 66

If

a

and

b

are odd numbers, then which of the following is even?

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Quantitative Aptitude for Competitive Examinations>Chapter 1 - Number System>Practice Problems Level 2>Q 67

If two numbers

x

and

y

are separately divided by

a

number

d

, remainders obtained are

4, 375

and

2, 986

respectively. If the sum of the numbers i.e.,

(x + y)

is divided by the same number

d

, the remainder obtained is

2, 361

. The value of the number '

d

' is:

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Quantitative Aptitude for Competitive Examinations>Chapter 1 - Number System>Practice Problems Level 2>Q 68

The expression

(92)^{2} - (85)^{2}

is divisible by: