Plzz solve any tow
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15.... a=20
....16.....ans 11...❤
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Q.no . 1
7 x 5 x 3 x 2+ 3
= 3 ( 7 x 5 x 1 + 1)
= 3 ( 36)
=108
It has more than two factors; 3 , 36 , 1 n itself.
therefore,it is a composite no.
Q.no.2. Let a be a positive odd integer and b=4, we apply the division algorithm for a and b=4.
We get a=4q+r, for q greater than or equals to 0, and 0 <or = r < 4
Possible remainders are 0, 1, 2, and 3.
That is , a can be 4q , 4q +1, 4q+2 or 4q+3, where q is the quotient .
However , since a is an odd no. , a cannot be 4q = 2(2q) or 4q +2 = 2(q+1)
since they both r divisible by 2
Therefore any odd positive integer is of the form 4q +1 or 4q+3.
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