Welcome to your 07 Math

1. 
The area of four walls of a room is 420 Square meter. If length of the room is double the breadth of the room and wall is 5 m high, Find length and breadth of the room?
2. 
The height of an equilateral triangle is √6cm, Its area is :
3. 
Express Rs. 0.56 as a percentage of Rs. 3.50
4. 
Water and Milk are mixed in the ratio 2:7. Find the quantity of water in 54 liters of mixture.
5. 
How much distance, in metres, a wheel of 25 cm radius will cover, if it rotates 560 times?
6. 
For a non-zero integer a which of the following is not defined?
7. 
Observe the shapes 1, 2, 3 and 4 in the figures. Which of the following statements is not correct?
8. 
If p squares of each side 1mm makes a square of side 1cm, then p is equal to
9. 
In the standard form of a rational number, the denominator is always a
10. 
Increase Rs 512 by 6%
11. 
Which sign will come in the blank space? – 231 + 79 + 51 _________–399 + 159 + 81
12. 
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.
13. 
The rational number _________ is neither positive nor negative.
14. 
If the sides of a parallelogram are increased to twice its original lengths, how much will the perimeter of the new parallelogram increase?
15. 
A car manufacturer claimed that CO₂ emissions from a car were 160g/km. Their latest model has emissions at 15% less. What are the CO₂ emissions on the new car?
16. 
Water level in a well was 30 m below ground level. During rainy season, rainwater collected in different water tanks was drained into the well and the water level rises 10 m above the previous level. The wall of the well is 1m 30cm high and a pulley affixed at a height of 70 cm. Ram wants to draw water from the well. The minimum length of the rope, that he can use is
17. 
The root of the equation 6x=0 is
18. 
( – 43) × ( – 99) + 43 is equal to
19. 
The solution of the equation 3x + 7 = – 20 is
20. 
In any rational number p/q, denominator is always a non-zero integer.