YB4 GenEd - Mathematics

Simplify: 3x- (2y - 4x) + 6y

• 7x+4y

• 7x-4y

• 2

• 13

Simplify: 2x-{3y- [5x- (7y-6x) ]}

• -13x-10y

• 13x-10y

The total amount due on P20,000 which has been invested for five years at 10% annual interest is ____.

• P 10,000

• P 30,000

Answer explanation

Interest I = Principal × Rate of Interest(%) × Time (in years) / 100

(20,000 x 10 x 5) / 100 = 10,000

Amount = Principal + Interest

= 10,000 + 20,000

= 30,000

Skyway Company manufactures tables and chairs. . In its catalog, a round table is priced at P6,000 less 15%. What will Iah have to pay for the round table?

• P 5,100

• P 5,300

The least common multiple of 8, 6, 3 is ___.

• 24

• 48

A 10-meter board leans against the wall. The foot of the board is 8 meters from the wall. How far up the wall does the board reach?

• 6 meters

• 4 meters

Answer explanation

solved by using Pythagoras theorem

10(2)-(8)2

10×10 - 8×8

100-64

=36 the square root of 36 will be 6

Karlo had an average of 70% in his first two tests and an average of 80% in his next three tests. The average for his five test is _____.

• 80

• 76

Bernadette's aquarium has length, width and height of 10 cm, 8 cm and 6 cm respectively. It's volume is _____.

• 240 cubic centimeters

• 480 cubic centimeters

The least common multiple of 5, 2, 7 is ___.

• 35

• 70