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Grade two – round one paper: 2007 question booklet

DURATION: 1 HOUR 15 MINUTES

MARKS: 20

NAME OF LEARNER:___________________________________

NAME OF SCHOOL:____________________________________

Instructions to learners:

1. You are expected to answer 15 questions.

2. These are multiple choice questions. Circle the correct answer.

3. Use blank pages for working. Circle the answer after you have done the working.

4. You are not allowed to use the calculator.

7. First 10 questions – 1 mark each.

8. Questions 11-20: 2 marks each.

Exercise 1

Count the number of rectangles in this arrangement:

(A) 17 (B) 19 (C) 21

Exercise 2

Find the value of $\Delta$ :

$56+34=50+\Delta$

(A) 40 (B) 50 (C) 60

Exercise 3

Find $\frac{1}{2}$ of 36.

(A) 16 (B) 18 (C) 20

Exercise 4

Double 39 equals?

(A) 74 (B) 76 (C) 78

Exercise 5

Write down the value of $\Delta$ in the following addition problem:

(A) 3 (B) 2 (C) 1

Exercise 6

(A) 32 (B) 36 (C) 42

Exercise 7

Write down the value of $\Delta$ in this subtraction problem:

(A) 5 (B) 7 (C) 9

Exercise 8

There are 24 numbered blocks below:

P moved 3 blocks to the left, 2 blocks down and 4 blocks to the right. On which block is P now on?

(A) 23 (B) 24 (C) 17

Exercise 9

Honeybee moves from one flower to the next in the following way:

It started at flower I and moved to flower G and then to flower E (skipping one flower each time). Honeybee visited 50 flowers.Which flower did Honeybee end up in?

(A) G (B) E (C) C

Exercise 10

Links and Chains. Double the number each time to move from one block to the other. Which number is in block 1?

(A) 2 (B) 4 (C) 8

Exercise 11

Find the mystery number:

* I am a 3 digit number.

* Y is 1 more than Z.

* X + Z = Y

* X + Y + Z = 10

(A) 165 (B) 154 (C) 343

Exercise 12

Lily gave 10 sweets to Alvin and $\frac{1}{4}$ to Lee. She still had 26 sweets. How many sweets did Lily start with?

(A) 45 (B) 48 (C) 54

Exercise 13

Pearl had 3 teaspoons (15ml) of medicine 2 times each day. After how many days will the medicine in a 200ml container be finished?

(A) 5 days (B) 6 days (C) 7 days

Exercise 14

Thabo is 3 years older than Bishop. Bishop is 6 years younger than Jeff. Jeff is 15 years old. What is Thabo’s age?

(A) 9 (B) 12 (C) 14

Exercise 15

The following is in balance:

Which is the lightest?

(A) □ (B) $\Delta$ (C) $O$

Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
what does nano mean?
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
it is a goid question and i want to know the answer as well
Maciej
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
for screen printed electrodes ?
SUYASH
What is lattice structure?
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
how did you get the value of 2000N.What calculations are needed to arrive at it
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