## Lakshya Education MCQs

Question: ___________ is a factor of every number and every number is a factor of _____________.

Choose the suitable pair from the following.
Options:
 A. 2, next number B. 2, itself C. 1, itself D. 1, next number
: C

1 is an exact divisor of all the numbers.Also, any number is divisible byitself.

Therefore,1 is a factor of every number and e
very number is a factor of itself.

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## More Questions on This Topic :

Question 1. Which of the following is the largest two-digit multiple of 19?
1.    85
2.    76
3.    96
4.    95
: D

19× 1 = 19
19
× 2 = 38
19
× 3= 57
19
× 4= 76
19
×5 = 95
19
× 6= 114
Hence, the largest two-digit multiple of 19 is 95.
Question 2. 7 consecutive composite numbers less than 100 are -
1.    81, 82, 83, 84, 85, 86, 87
2.    90, 91, 92, 93, 94, 95, 96
3.    65, 67, 68, 69, 70, 71, 72
4.    46, 47, 48, 49, 50, 51, 52
: B

All the numbers in the option:90, 91, 92, 93, 94, 95, 96have more than 2 factors, hence they are all composite numbers.
Question 3. The largest 3 digit composite number is:-
1.    1000
2.    999
3.    989
4.    949
: B

Composite numbers are those numbers which are not prime numbers except 1. 1 is regarded as a unique number.
The largest 3 digit number is 999 and it is a composite number. (divisible by 3, 9 etc)
Question 4. A perfect number is:
1.    a number whose sum of factors is equal to twice the number.
2.    a number whose sum of its digits is equal to the product of its digits.
3.    a number whose sum of  factors is equal to thrice the number.
4.    a number which is co-prime to every other number.