Ninja Round

Physical Science

10

What are the two different forces acting on a falling leaf?

air resistance and gravity

20

The other name for the antemeridian.  

International Date Line

30

What is the SIZE AND ORIENTATION of the image formed by a concave mirror if the object is placed more than two focal lengths (more than 2F) from the mirror?

diminished/reduced and inverted

40

It refers to the true brightness of a star located at 10 parsecs.

absolute magnitude

50

A light bulb with resistance of 2 ohms is connected to a 15-V battery. What is the current flowing through the circuit?

7.5 A or 7.5 amperes

Patterns & Algebra

10

What are the roots of the quadratic equation, 

2x²+6x-108=0?

x = -9, 6

20

Simplify completely: (x³ - 3x² - 4x) ÷ (x² - 16)

^x(x+1)/_(x+4)

30

Determine the remainder of the function P(x)=x³-2x+4 if P(x) is divided by x+2

0 or zero

40

What is the equation of the line that passes through the points (0,-5) and (2,8)? Write your answer in standard from.

13x - 2y = 10

50

Solve for x: (2¹⁶ ·  32) ÷ 64 = 2^2x-1

x = 8

BioChem

10

Organisms that consume nutrients from decaying matter are considered to be _____.  

saprophytic

20

Cats, for example, are not native to the Philippine land. They change how the food chain is structured in a certain community. These characteristics categorize cats as _____ species.

invasive

30

How many valence electrons does fluorine have?

7

40

The pituitary gland produces this hormone to stimulate sperm production in males and egg production in females.

follicle-stimulating hormone or follicle-stimulating

50

What is the correct electron configuration of phosphorus that has an atomic number of 15?

1s²2s²2p⁶3s²3p³

Numbers & Number Sense

10

Set A contains the factors of 54 while set B contains the set of prime numbers, what numbers are common to both?

{2, 3} or 2, 3

20

-14 - 6²/₅ + 2.4

-18

30

Three pencils and one notebook cost Php 90, while one notebook and two ballpens cost Php126. If one ballpen costs thrice as much as one pencil, how much is one notebook?

Php 54

40

In a class of 75 students, 29 are wearing a wristwatch. If ³/₇ of the girls and ¹/₃ of the boys are wearing wristwatch, how many boys are there in the class?

33 boys

50

It is the 15% of the 60% of 15,000.

1350