45. DIVISIBILITY TESTS - EXAMPLES | |||
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Pick-up the techniques

Test Divisibility of the famous number,

1 + 7 + 2 + 9 >> 19 >> 10>> 1;

Not divisible by 3.

1729 - 2x9 = 154 >> 154 - 2x4 = 7;

Yes, Divisible by 7.

1 + 2 = 3 & 7 + 9 = 16; Difference is 13;

13 is not a multiple of 11. So not divisible by 11.

1729 + 4x9 = 208 >> 208 + 4x8 = 52

>> 52 + 4x2 = 13;

Yes, Divisible by 13.

1729 - 5x9 = 127 >> 127 - 5x7 = -23;

No, Not divisible by 17.

1729 + 2x9 = 190;

Yes, Divisible by 19.

1729 + 7x9 = 235 >> 235 + 7x5 = 58;

No, Not divisible by 23.