1.

Check whether 2156 is divisible by 11 and 7? Verify whether 2156 is divisible by product of 11 and 7?

Answer»
NumberDivisible by 7  Yes/NoDivisible by 11  Yes/NoDivisible by 11x7  Yes/No
2156 a = 2,b = 1, c = 5, d = 6
6a + 2b + 3c + d
= 6x2 + 2x1 + 3x5 + 6
= 12 + 2 + 15 + 6 
\(\rightarrow\) 35/7(R - 0) Yes
2156 
(2 + 5) - ( 1 + 6)
= 7 - 7 = \(\rightarrow\) 0/11(R - 0) Yes
∴ 2156 is divisible by the product of 11 and 7.



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