Grade 7 quiz November 2022

Integers

100

1.The smallest negative integer is -------

Not defined / does not exist

200

2. Determine the largest and smallest integers from the following integers.

-12, 7, 8, 0, -9, 5, -10

8, -12

300

Choose the correct option:

3. On multiplying largest 3-digit integer with the smallest 2-digit positive integer we get----

a)10001   b) 9990   c) 9900  d) 9991

999 x 10= 9990

b)

400

4. What should be divided by -5 to get 1000

-5000

sol: -5000/-5 = 1000

500

5. Find the product:

26 x(-48) + (-48) x (-36)

480

sol: (-48) x (26 + (-36))

       (-48) (26-36)

          (-48)(-10)= 480

Fractions and decimals

100

1) 1.004 - 0.4 = ----------

a)0.006  b) 0   c) 0.604   d) 0.640

c) 

0.604

200

2) Find 11/25 of a liter ( liter = 1000 ml)

ans: 440

11/25 x 1000= 

11 x 40= 440

300

3) Which is greater : 1/2 of 6/7 or  2/3 of 3/7

ans: 1/2 of 6/7 greater

sol: 1/2 of 6/7 = 1/2 x 6/7 =3/7

2/3 of 3/7 = 2/3 x 3/7 = 2/7

400

4) Multiply: 62.48 x 5.9 

ans: 368.632

500

5) Divide 9.27 by 15

ans: 0.618

Algebraic Expressions

100

1) If a=2, b= -2 find the value of a² + b²

ans: 8

(2)² + (-2)²

4 + 4 =8

200

2) Degree of 4x⁵y⁹+5x¹³+9x²y²z⁶

ans: 14

300

3) Subtract (a-b) from (a+b)

ans: 2b 

a+b -(a-b)

a+b-a+b

2b

400

4)Simplify: x + 7 + 4(x-5)

ans: 5x -13

x +7 +4x -20

x + 4x +7 -20

5x -13

500

5)Identify binomial and trinomial from the following:

i) 3x + 5x +7y + 8x + 17x ii) x + 5x+ (-3x)

 iii)26abcdefghijklmnopqrstuvwxyz

iv)x² + y² + 4x² + z³ + y² + 4z³ + x² 

ans: i) Binomial

      iv) Trinomial

Simple Equations

100

1) Find the solution for the equation 3(x) = 15

ans: 5

200

2)Write the following statement as equation:
4 subtracted from one-fourth of p gives 6. 

Ans: (1/4) p -4 =6

300

3) Solve: 2(x +4) = 12

Ans : x=2

2x +8 =12

2x = 12-8

2x = 4

x =2

400

4) Think a number, add 11 to it and divide the sum by 7.  The result is 9. What was the number? 

Ans : 52

sol: x + 11/7  =9

x + 11 =9 x 7

x+ 11 = 63 

x = 63 -11= 52

500

5) The sum of three times a number and 15 is 42. Find the number. 

Ans: 9

3x +15 =42

3x = 42-15

3x =27

 x= 9

Exponents and powers

100

1) What is the value of 3⁵ 

243

200

2) Comparing the following:

2 x 1.5 x 10⁵ and     3 x 10² x 10³

Both are equal

2 x 1.5 x 10⁵ =3 x 10⁵

3 x 10² x 10³ = 3 x 10⁵ 

300

3)Which one is greater

5³ or 3⁵

 3⁵ 

^{125 < 243}

400

4) Express in exponential form: 512

2⁹

500

5) 2) Express 39087.8 in standard form

3.90878 x 10⁴