Welcome to your 07 Math

1. 
Every integer is a rational number but every rational number need not be an integer.
2. 
The rational numbers –11/–4 and –6/19 are on the opposite sides of zero on the number line.
3. 
If m, n and p are integers, then according to the associative law of multiplication, (m × n) × p must be equal to:
4. 
By what rational number should we multiply with -7/9 to obtain the product as 63 ?
5. 
Length of tape required to cover the edges of a semicircular disc of radius 10 cm is
6. 
Which sign will come in the blank space? – 231 + 79 + 51 _________–399 + 159 + 81
7. 
Rectangle MNOP is made up of four congruent rectangles. If the area of one of the rectangles is 8 sq m and length is 4 m, then find the perimeter of MNOP.
8. 
The solution of the equation ax + b = 0 is
9. 
There are 20 Math books in a bookcase. When the number of books increases by x percent, the new number of Math books is 26. What is the value of x?
10. 
An English jeweler sold Rs. 35000 worth of jewels in one month (his ‘turnover’) and made a profit of Rs. 14000. What is his profit as a percentage of his turnover?
11. 
Find the value of 8 × 53 × (–125)
12. 
Which sign will come in the blank space? 6-3 x 11 ____________ (6-3) x 11
13. 
Area of shaded portion in
14. 
In a bag the number of one rupee coins is three times the number of two rupee coins. If the total worth of the coins is ₹120, Find the number of two rupee coins.
15. 
Which of the following shows the maximum rise in temperature?
16. 
Which sign will come in the blank space? 39 + (– 24) – (15) _______________36 + (– 52) – (– 36)
17. 
If 1m² = x mm² , then the value of x is
18. 
A number has two digits whose sum is 9. If 27 is added to the number; its digits get interchanged. Find the number.
19. 
(– 25) × [6 + 4] is not same as
20. 
|p - q| = |p| - |q|, where p and q are natural numbers and p < q.