Which of the following numbers are divisible by 11:

(i) 10835

(ii) 380237

(iii) 504670

(iv) 28248

In each of the following replace * by a digit so that the number formed is divisible by 11:

(i) 64 × 2456

(ii) 86 × 6194

In each of the following replace * by a digit so that the number formed is divisible by 6:

(i) 97 × 542

(ii) 709 × 94

In each of the following replace × by a digit so that the number formed is divisible by 9

(i) 49 × 2207

(ii) 5938 × 623

If 42z3 is a multiple of 9, where z is a digit, what is the value of z?