Question

1. In each of the following numbers, replace * by the smallest digit to make it divisible by 11 :
(1) 35 +6
(ii) 439 * 71
(iii) 86 * 72 (iv) 1723 * 4
2. Which of the following are prime numbers?
(1) 277
(ii) 143
(iii) 253
(iv) 397
(v) 331
(vi) 167
(vii) 203
(vii) 161​

Answer 1

Answer:

1

1. 7
2. 5
3. 1
4. 0

2

1. prime
2. composite
3. composite
4. prime
5. prime
6. prime
7. composite
8. composite