Aptitude - Problems on Numbers Questions and Answers

Aptitude : Problems on Numbers

Here we are discussing the various problems on numbers. All questions are in form of MCQ with unique answers.

1. In the product 3759 x 9573, the sum of tens' digit and units' digit is ?
[A] 9
[B] 16
[C] 0
[D] 7
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2.

There is a 5 digit no. Sum of 3 pairs of digits is eleven each. Last digit is 3 times the first one. 3rd digit is 3 less than the second. 4th digit is 4 more than the second one. Find the number.


[A] 25296
[B] 26594
[C] 24569
[D] 26458
[E] None of these
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3.

The least number which when divided by 4, 6, 8, 12 and 16 leaves a remainder of 2 in each case is


[A] 46
[B] 48
[C] 50
[D] 56
[E] None of these
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4.

Maximum numbers that can be formed using all the 4 digits 6, 4, 8, 1 without repetition and which is divisible by 9 ?


[A] 0  
[B] 450
[C] 900
[D] 150
[E] None of these
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5.

In a division sum, the divisor is 10 times the quotient and 5 times the remainder. If the remainder is 46, the dividend is:


[A] 4236
[B] 4306
[C] 4336
[D] 5336
[E] 5290
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6.

Find the smallest number which leaves 22, 35, 48 and 61 as remainders when divided by 26, 39, 52 and 65 respectively.


[A] 760
[B] 776
[C] 766
[D] 780
[E] None of these
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7.

Find the smallest 8-digit number which gives 15 as a remainder when divided by 38, 22 and 16.


[A] 10002004
[B] 10002015
[C] 10001919
[D] 10000015
[E] None of these
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8.

Let p and q be two prime numbers such that p is greater than q. If 319 is their LCM then the difference of thrice of q and p is:


[A] 1
[B] 0
[C] 4
[D] 9
[E] None of these
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9.

Let 13 and 273 are the HCF and LCM of two numbers respectively, and if one of them is less than 140 and greater than 60. Then what will be that number?


[A] 121
[B] 91
[C] 75
[D] 131
[E] None of these
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10. What is the smallest number by which 2880 must be divided in order to make it into a perfect square?
[A] 3
[B] 4
[C] 5
[D] 6
[E] None of these
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