2.
Find the number by which 2−6 be multiplied so that the product is 2?
3.
A shopkeeper bought 10 kg. of rice for Rs 210, 5 kg. of rice at Rs 16 per kg and 0.5kg. for Rs 20. Find the average cost of the rice per kg.
4.
A 240 m long train running at 72 km/h crosses another train coming from opposite direction at a speed of 90 km/h in 12 seconds. Find the length of the other train.
5.
The average weight of 30 boys is 57 kg and average weight of 25 girls is 35 kg. Find the average weight of the class.
6.
Find the degree of q[(x³ – x²)²].
7.
Period of the decimal 2.3636363……. is :
8.
The expanded form of (x + y ) (x – y) is a :——
9.
If p + q =15 and pq=54, then p – q can be
11.
( a – 1 ) ( a² + a + 1 ) = ?
12.
In a shooting game, if we hit a balloon, we get 50 points and if we miss the balloon, we lose 30 points. A person hits 30 balloons and misses 35 balloons. Find his net score.
13.
Find the least natural number which when divided by 6, 7, 9, 12 and 18 leaves no remainders.
14.
A train covers the distance between two cities in 12 hours. How much time will a car take which has an average speed of 1.2 times that of the train .
15.
What is the quotient when (x³ − 8) is divided by (x² + 2x +4)?
16.
What is the additive identity element in the set of whole numbers?
17.
Which of the following is a perfect square?
18.
Find the product of the values of the expression 2x² – 2x + 2 when x= -1 and x= 1.
19.
If a² – b² = 36 and a + b =4, then (a – b)² =———-
20.
Find the degree of (x² – x )²
