Quant Boosters  Hemant Malhotra  Set 14

Q30) A teacher asks one of her students to divide a 30digit number by 11. The number consists of six consecutive 1’s, then six consecutive 2’s, and likewise six 3’s, six 4’s and six 7’s in that order from left to right. The student inserts a threedigit number between the last 4 and the first 7 by mistake and finds the resulting number to be divisible by 11. Find the number of possible values of the threedigit number.

@hemant_malhotra Approach?sir

@hemant_malhotra 1/5?.............................................................

@hemant_malhotra 22?.......................................................................

@hemant_malhotra None of the above?.....................

@hemant_malhotra 20???........................................

@hemant_malhotra 4&0???????????????????????????????????????????????????????

@RakeshAchanta Steps please ..........................

@RakeshAchanta Steps please ......................

@akash achanta use venn diagram

@hemant_malhotra is it 4(2 root2 +root5)?

@hemant_malhotra
a = 1, b = 0, c = 16.