Welcome to your 07 Math

1. 
What percent is 120 of 90?

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2. 
The circumference of a circle whose area is 81πr², is

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3. 
12 m² is the area of

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4. 
Find the area of a square park whose perimeter is 440 m, Also find the cost of growing grass on it at the rate of ₹ 2.15 per sq. m?

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5. 
After 12 years Rohit will be 3 times as old as he was 4 years ago. Find his present age.

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6. 
In the standard form of a rational number, the common factor of numerator and denominator is always:

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7. 
The solution of the equation ax + b = 0 is

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8. 
Length of tape required to cover the edges of a semicircular disc of radius 10 cm is

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9. 
A certain freezing process requires the room temperature to be lowered from 50ºC at the rate of 8ºC every hour. What will be the room temperature 7 hours after the process begins?

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10. 
Value of x in this equation. 2x+10=x+10 is

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11. 
Ratio of area of ΔMNO to the area of parallelogram MNOP in the figure is :

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12. 
Find the value of (–57) × (–19) + 57

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13. 
Which of the following numbers satisfy the equation –6 + x = –12 ?

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14. 
If 18 students were paid a pocket money of ₹3996 (each student got equal amount), then how many students can be paid with ₹ 3330 at the same rate?

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15. 
What is the radius of the largest circle that can be cut out of the rectangle measuring 10 cm in length and 8 cm in breadth?

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16. 
In reference to a circle the value of π is equal to :

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17. 
The perimeter of a floor of a room is 18 m .What is the area of four walls of the room if its height is 4 m?

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18. 
Which of the following statements is not true?        

(a) When two positive integers are added, we always get a positive integer.
(b) When two negative integers are added, we always get a negative integer.
(c) When a positive integer and a negative integer are added, we always get a negative integer.
(d) Additive inverse of an integer 2 is (-2) and additive inverse of (-2) is 2.

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19. 
Ragini’s income is 25% more than Rohin. How much percent is Rohin’s income less than Ragini?

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20. 
Which of the following is different from the others?

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