Page 89 - ICSE Math 6

10. Evaluate.

11 2 2 5 3 1
(a) + (b) 1− (c) + −
19 19 11 7 7 7
1 4 5 1 3 5  8 3 
(d) 2 + + 3 (e) 1 + − (f) 4 − −  3 
3 9 6 7 14 21  11 11
2
(g) 2 × 9 (h) 11 169 4 25 (i) 3 ×1 1 ×2 1
× ×
×
3 14 13 121 5 16 3 11 4
1 1 2 2 1 3 4 5
(j) 7 ×12 ×1 × (k) 2 ÷ 3 (l) 3 ÷
5 2 95 7 14 7 21
5
11. If of a number is 125, then find the number.
9
12. Simplify:
1
(a) 1 of 90 1 of 1+ 3 6 + 2 of 25 (b) 5 of  7 + 1   5 − 3  + 2 1
÷


 
3 4 14 5 24  15 3  6 5  2
(c)  1 − 1  3 − 4   1 − 2 + 1  + 1 3 (d) 1 of 60 ÷ 40 +   7 – 3   ×1 5
÷

 


 2 3 4 5   2 5 7  4 3  8 5  11
÷
(e)  1 ÷ 7 1 1  of 7 ÷   1 1 2   2 − 3 2 6  (f)   1 ÷ 1   1 – 4 ÷ 20    –  4 of 3 1 
−



 

 


 8 2   3 9   4 7    2 32   3 5 3   5 8 
3
1
13. There are 400 oranges in a basket. If of them are rotten and of them have been peeled, how
8 4
many oranges are neither rotten nor peeled?
3
14. After covering of the journey, Gaurav finds that 27 km have been covered. How much distance
5
is still left to be covered?
1 1
15. Rehan’s monthly salary is ` 27,000. If he spends on food and on house rent, then how much
money does he save? 3 6
2 8
16. A train can cover 950 km in 6 h. What distance can it cover in:
3 9
4
(a) 1 h (b) 2 h
5
1 3
17. If Nitin reads of a book having 350 pages on the first day and of the remaining book on
7 4
the second day, then how many pages are left to be read?

a 15 a b− a b+
18. If = , then what is the value of and ?
b 8 b b
 a c a b− c − d a b+ c + d 
 Hint: If = , then = and = 
 b d b d b d 

73