1. (+) 10
2. ( -) 1
3. (+) 1
4. 0
( -) 1
1. - 4
2. - 2
3. + 4
4. 0
+ 4
1. 4 cm
2. 6 cm
3. 3 cm
4. 3.5 cm
3 cm
1. 50
2. 140
3. 25
4. 70
70
1. a2+ b2
2. ab
3. a2- b2
4. a/b
ab
1. 5.5 cm
2. 6.5 cm
3. 6 cm
4. 7 cm
6 cm
1. 1/a+ 1/b = 1/c
2. a + b = c
3. 1/a + 1/b = 2/c
4. None of these
1/a + 1/b = 2/c
1. 82
2. 41
3. 56
4. 28
41
1. 28
2. 14
3. 82
4. 41
28
1. 2
2. 3
3. 4
4. 5
2