Number Properties Puzzle – Challenge 6

This is a great math puzzle for high-ability learners. This is for those who love critical thinking problems. Let's see if you can solve it!

Number Properties Puzzle – Challenge 6

Challenge:

In a children’s game, students count from 1 to 100 and applaud every time that they find either a multiple of 3 or a number ending with 3. How many times are they supposed to applaud?

A- 30

B- 33

C- 36

D- 39

E- 40

The Absolute Best Book to Challenge Your Smart Student!

Original price was: $16.99.Current price is: $11.99.
Satisfied 123 Students

The correct answer is D.

There are 33 numbers that are multiple of 3 less than 100 (3, 6, 9, 12, 15, …) and there are 10 numbers that are ending with 3 (3, 13, 23, 33, 43, …). From those numbers, 4 numbers (3, 33, 63, 93) are also the multiple of 3. Therefore, there are 39 numbers that are either a multiple of 3 or ending with 3:
33 + 10 – 4 = 39

The Absolute Best Books to Ace Algebra

Original price was: $29.99.Current price is: $19.99.
Original price was: $29.99.Current price is: $14.99.
Original price was: $29.99.Current price is: $14.99.
Satisfied 1 Students
Original price was: $24.99.Current price is: $14.99.
Satisfied 92 Students
Original price was: $24.99.Current price is: $15.99.
Satisfied 125 Students

Related to This Article

What people say about "Number Properties Puzzle – Challenge 6 - Effortless Math: We Help Students Learn to LOVE Mathematics"?

No one replied yet.

Leave a Reply

X
45% OFF

Limited time only!

Save Over 45%

Take It Now!

SAVE $40

It was $89.99 now it is $49.99

The Ultimate Algebra Bundle: From Pre-Algebra to Algebra II