Question

1. Find the even numbers between 168 and 242.
2. Find the odd numbers between 1,387 and 1,492.
3. Express each of the following numbers as the sum of three odd prime numbers:
(a) 49 (b) 31 (C) 63
4. Which of the following numbers are divisible by 2,5, or 10?
(a) 25,110 (b) 27,338 (C) 75,125
(d) 63,169 (c) 8,45,510 (1) 70,160
5. Examine the following numbers for divisibility by 6:
(a) 7,51,032 (b) 36,366 (c) 93,573
(d) 9,01,352
6. In each of the following replace by a digit so that the number formed is divisible by 11:
(a) 1*42 (b) 3149 (C) *213
(d) 8*9484
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Answer 1

Answer:

1. The even numbers between 168 and 242 are 170 172 174 176 ..... 228 230 232 234 236 238 240
2. The odd numbers between them are 1389 1391 1393........ 1483 1485 1487 1489 1491
3. (a) 5 + 3 + 41 (b) 5 + 3 + 2 (c) 3 + 7 + 53
4. All of them are divisible except 63169
5. In order to be divisible by 6 it should be divisible by 2 and 3 both. So apply the divisibility rule.