Aptitude · all questions

Number System
practice.

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Q281

A rational number between

\frac{3}{4}

and

\frac{3}{8}

is :

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Q282

If the operation '*' is defined by a * b = a + b - ab, then 5 * 7 equals :

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Q283

The smallest five digit number which is divisible by 12, 18 and 21 is :

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Q284

1 + \frac{1}{2} + \frac{1}{4} + \frac{1}{7} + \frac{1}{14} + \frac{1}{28}

is equal to :

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Q285

In a two digit number, the digit at the unit's place is 1 less than twice the digit at the ten's place. If the digits at unit's and ten's place are interchanged, the difference between the new and the original number is less than the original number by 20. The original number is :

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Q286

Find the sum of all positive multiples of 3 less than 50 :

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Q287

The value of

(0. 63 + 0. 37)

is :

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Q288

If 1 is added to the both the numerator and the denominator of a fraction, it becomes

\frac{1}{4}

. If 2 is added to both the numerator and the denominator of that fraction it becomes

\frac{1}{3}

. The sum of the numerator and the denominator and the denominator of the fraction is -

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Q289

A man ate 100 grapes in 5 days. Each day he ate 6 more grapes then those he ate on the earlier day. How many grapes did he eat on the first day ?

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Q290

The least number of five digits which is divisible by 123 ?

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Q291

The digit in unit's place of the product -

(2464)^{1793}

\times (615)^{317}

\times (131)^{491}

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Q292

Thrice the square of a natural number decreased by four times the number is equal to 50 more than the number, the number is -

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Q293

999 \frac{1}{7} + 999 \frac{2}{7} + 999 \frac{3}{7} +

999 \frac{4}{7} +

999 \frac{5}{7} +

999 \frac{6}{7}

is simplified to-

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Q294

The unit digit in

(122)^{173}

is ?

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Q295

2^{16} - 1

is divisible by -

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Q296

If a = 4011 and b = 3989, then value of ab = ?

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Q297

5349 is added to 3957. Then 7062 is subtracted from the sum. The result is not divisible by :

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Q298

Find the sum of all positive multiples of 5 less than 100.

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Q299

A number divided by 52 gives remainder 45. If the number divided by 13 , the remainder will be :

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Q300

The greatest among following numbers is :

(3)^{\frac{1}{3}},

(2)^{\frac{1}{2}}

, 1,

(6)^{\frac{1}{6}}

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