STANDARD 7TH MATH CH NO 2MULTIPLICATION & DIVISION OF INTEGERS SSC BOARD

Class 7th ch 1 notes

If the positive integer N leaves a remainder of 3 when divided by 7 , which of the folllowing statements would be ture ? I. 4N + 2 is divisible by 14 II. N^(2) - 2 is divisible by 7 III. (N + 3) ( N + 4) is divisible by 7.

CH_(3)(CH_(2))_(7)CH =CH(CH_(2))_(7).COOH is

What is the correct IUPAC name of the following compound? CH_3 CH_2CH_2 CH_2 CH_2 underset(CH_3 ) underset(| )(CH )- underset(CH_2 CH_2 CH_3) underset(|)overset(CH_3) overset(|) C- CH_2 CH_3 3, 4-dimethyl-3n-propylnonane 6,7-dimethyl-2-n-propyinonane 6,7-dimethyl-7-ethyldecane 4,5-dimethyl-4-ethyldecane.

If n in N , then 3^(2n)+7 is divisible by

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