Grade 7 MTAP 2015 Questions with Solutions Part 5

This is the fifth part of the Metrobank-MTAP Math Challenge Questions for Grade 7. In this post, we discuss the solutions to number 41-50. You can also read the solutions to 1-10, 11-20, 21 – 30, and 31-40.

41.) Each square in the figure has side length 1. The curve each square is a circular arc with center at a corner of the square. What is the area of the shaded region?

Screen Shot 2016-01-02 at 10.21.11 AM

Solution: will be discussed in a separate post.

Answer: 8 square units

42.) What is the least common multiple of 168 and 420? 

Solution

Left as an exercise.

Answer: 840

43.) A salesman receives a basic salary of Php10, 000 and a commission of 5% on all sales. Find his total sales in a month when he earned Php25, 000?

Solution

10, 000 + .05x= 25, 000

0.05x = 15, 000

x = 300 000

Answer: Php 300, 000.00

44.) What is the absolute value of 2x^2 - 8x + 2 at x = 5/2?

Solution

|2(5/2)^2 - 8(5/2) + 2| = |2(25/4) - 20 + 2| = |25/2 - 20 + 2| = |-11/2| = 11/2

Answer: 11/2

45.) Find all real numbers for which (7 – x)/2 > (4x + 3)/4

Solution

Multiplying both sides by 4, we have

2(7 – x) > 4x + 3

14 – 2x > 4x + 3

11 > 6x

11/6 > x

x < 11/6

46.) For what values of x is (3x – 1)/4 < (2x + 5)/3?

Solution

Multiplying both sides by 12, we obtain

3(3x – 1) < 4(2x + 5)

9x – 3 < 8x + 20

x < 23

47.) Write an equation of the line through (-2, 3) and (1,4).

Solution

The slope of the line is m = (4 – 3)/(1-(-2)) = 1/3.

We use the point slope form. That is,

y – 4 = (1/3)(x – 1)

y – 4 = 1/3x – 1/3

3y = x + 11

y = (x + 11)/3

Answer: y = (x + 11)/3

48.) Solve for x and y: 7x – 3y = 23 and x + 2y = 13.

Solution

Multiplying x + 2y = 13 by -7, we have

-7x – 14y = -91 (*)

7x – 3y = 23 (**)

Adding (*) and (**), we obtain

-17y = -68

y = 4.

Substituting y to x + 2y = 13,

+ 2(4) = 13

x = 5

49.) Pete is 12 years old and His grandfather 63 years old. And how many years we’ll be age be one fourth of his grandfather?

Solution    

Let x be the number of years to be added to both ages.

(1/4)(63 + x) = 12 + x

Multiplying both sides by 4,

63 + x = 48 + 4x

3x = 15

x = 5

Answer: 5 years

50.) ABC has its coordinates at A(a, -1), B(8, -1), and C(5,4). If the base is twice the height, find a.

Solution

If we let AB be the base, then the height is the difference between y-coordinate of C and -1. That is, |4 -(-1)| = 5.

Now, |a – 8| = 2(5) = 10

a – 8 = 10
a = 18
-(a – 8) = 10
8 – a = 10
a = 2
a = -2

Answers: a = -2 or a = 18

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10 Responses to Grade 7 MTAP 2015 Questions with Solutions Part 5

  1. michael angelo duck american says:

    SABIW

  2. michael angelo duck american says:

    wrong tanan imong answer

  3. kim says:

    Thank you for sharing this. I just want to ask if you have a copy of the Grade 7 MTAP division orals? thank you 🙂

  4. alma says:

    can help me search for division oral 2015.

  5. gypsy says:

    good day please answer.. cora multiplies a number by 2 instead of squaring it. then she subtracted 9 from the result instead of dividing the result by 9. if the result of the wrong calculation is 3, what is the result of the correct calculation?

  6. gypsy says:

    a group of children arranged themselves into circle. from remy and counting clockwise, nita is the 8th child. from remy and counting counter clockwise, nita is 15th child. how many children are there in all?

  7. Lukemugot says:

    So Easy!!!!!!!!! I want some difficult one because that is so easy……

    I LOVE YOU LEONIL BUTIL

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