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Hcf and lcm Practice Questions & Answers

0 vote

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

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The smallest five digit number which is divisible by 12,18 and 21 is :
1). 10224
2). 30256
3). 10080
4). 50321

34 vote

Let x be the smallest number, which when added to 2000 makes the resulting number divisible by 12, 16, 18 and 21. The sum of the digits of x is

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Let x be the smallest number, which when added to 2000 makes the resulting number divisible by 12, 16, 18 and 21. The sum of the digits of x is
1). 7
2). 5
3). 6
4). 4

22 vote

A number x is divisible by 7. When this number is divided by 8, 12 and 16. It leaves a remainder 3 in each case. The least value of x is:

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A number x is divisible by 7. When this number is divided by 8, 12 and 16. It leaves a remainder 3 in each case. The least value of x is:
1). 148
2). 149
3). 150
4). 147

1 vote

The greatest four digit number which is exactly divisible by each one of the numbers 12, 18, 21 and 28 is

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The greatest four digit number which is exactly divisible by each one of the numbers 12, 18, 21 and 28 is
1). 9828
2). 9288
3). 9882
4). 9928

0 vote

Let xbe the least number, which when divided by 5,6, 7 and 8 leaves a remainder 3 in each case but when divided by 9 leaves no remainder. The sum of digits of x is

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Let xbe the least number, which when divided by 5,6, 7 and 8 leaves a remainder 3 in each case but when divided by 9 leaves no remainder. The sum of digits of x is
1). 21
2). 22
3). 18
4). 24