Sunday, April 4, 2021

MATHS QUESTIONS AND ANSWERS

 In math questions answers each question is solved with an explanation:


A. Which number is greater than 4?

(a) 5

(b) -51

(c) -9

(d) -20

The answer is (a)

5 greater than 4.


B.Combine terms:-
 
12a + 26c -4c – 16a

(a) 4a + 22c

(b) -28a + 30c

(c) -4a + 22c

(d) 28a + 30c

S
olve:

12a + 26c -4c – 16a

= 12a – 16a + 26c – 4c

= -4a + 22c


The answer is (c)


C. 11+3*
5

(a). 23
(b). 39
(c). 26
(d). 70

Solve:


11+3*5

=11+15

=26

The answer is (c)

D. |-26|, which is right from below?

(a) -26

(b) 26

(c) 0

(d) 1


Solve:


|-26|

= 26.

The answer is (b)


E. Simplify:(4x2 - 2x) - (-5x2 - 8x).


Solve:


(4x2 - 2x) - (-5x2 - 8x)

= 4x2 - 2x + 5x2 + 8x

= 4x2 + 5x2 - 2x + 8x

= 9x2 + 6x

= 3x(3x + 2)


The Answer is 3x(3x + 2)


F. 16w3 – u4w3

Solve:

16w3 – u4w3

= w3(16 – u4)

= w3{42 - ((u2)2}

= w3(4 + u2)(4 - u2)

= w3(4 + u2)(22 - u2)

= w3(4 + u2)(2 + u)(2 - u)


The answer is


 w3(4 + u2)(2 + u)(2 - u)




 

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