Send-Off session 6 Grade3&4

Brenda multiplies a number by 3, adds 3, divides by 3, adds 6, subtracts 3 from the result to get 9. What is six times of the original number?

• 24

• 28

• 30

• 36

• 40

Which of the following is true?

• Four more than the sides of a decagon is the same value as the total number of sides of two

  heptagons stuck to each other.

• All regular quadrilaterals have sides of equal length.

• The difference between the number of sides of an octagon and a trapezium is a prime number.

• If a circle and a regular octagon have the same area, the length of the radius of the circle will be

  equal to the distance between the centre of any vertex of the octagon.

• The area of only right triangles is given by (b × h) ÷ 2

Natural numbers are also called counting numbers and they are positive integers starting from 1. For example, 1, 2, 3, 4, ... are natural numbers. The average of the sum of the first 4 natural numbers and the first 5 even numbers is _______.

• 36

• 24

• 20

• 18

• 12

One-fifth of all apples in a crate is rotten. Three-fourths are ordinary. The remaining are considered excellent. If there were 200 apples in a crate, how many excellent apples did it have?

• 10

• 8

• 6

• 4

• 2

Amanda’s score was twice Brian’s score. Cassie scored 5 points less than Brian. Dora scored 10 points more than Amanda. Dora’s score was 6 times as much as Cassie’s. Whose score was 10?

• Amanda

• Brian

• Cassie

• Dora

The largest natural number formed by the digits 4, 5, 0, 3 and the smallest number formed by using all of those digits exactly once, are subtracted. Assume that a valid number does not start with 0 unless it is 0 itself (which we shall consider to be a 1-digit number.) What is the number formed by

the first two digits of the result?

• 28

• 26

• 24

• 23

• 18

Three pentagons are stuck together as shown below. All sides are equal and measure 3 cm. What isthe difference between the total perimeter of the three individual pentagons and the final figure?

• 8 cm

• 12 cm

• 15 cm

• 18 cm

• 20 cm

What is the 2021st number in the sequence below?

7, 9, 11, 13, ...

• 4047

• 4042

• 4012

• 3080

• 3040

Which of the following numbers has an odd number of even prime factors?

• 442

• 400

• 182

• 128

• 100

Azma took part in a gymnastics competition where many people participated. When the rank list

arrived, it turned out that no one was disqualified. She was the 3rd place ahead of the first of the

lower half of the contestants. She was 3rd place behind the bronze medalist. The first prize is a gold

medal, the second prize is a silver medal and the third prize is a bronze medal. How many people

competed in all?

• 10

• 12

• 16

• 24

• 28